CN103131812A - Plate-type air and coal gas double-preheating system for hot blast stove - Google Patents
Plate-type air and coal gas double-preheating system for hot blast stove Download PDFInfo
- Publication number
- CN103131812A CN103131812A CN201110393584XA CN201110393584A CN103131812A CN 103131812 A CN103131812 A CN 103131812A CN 201110393584X A CN201110393584X A CN 201110393584XA CN 201110393584 A CN201110393584 A CN 201110393584A CN 103131812 A CN103131812 A CN 103131812A
- Authority
- CN
- China
- Prior art keywords
- pipeline section
- gas
- flue
- air
- preheater
- 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.)
- Pending
Links
Images
Landscapes
- Air Supply (AREA)
Abstract
The invention relates to a plate-type air and coal gas double-preheating system for a hot blast stove. The plate-type air and coal gas double-preheating system for the hot blast stove comprises a plate-type air preheater, a plate-type coal gas preheater, a chimney, a smoke pipeline and control system, an air pipeline and control system, and a coal gas pipeline and control system. Compared with the prior art, the plate-type air and coal gas double-preheating system has the advantages of being simple, compact, high in working condition stability, free of performance degeneration within the service life of the plate-type air and coal gas double-preheating system for the hot blast stove, being convenient to operate, easy to maintain, strong in system adjustment ability, and capable of adjusting the temperature of air and the temperature of coal gas and meeting production requirements, and being stable in system working condition, and capable of preheating the air and the coal gas to 180-200DEG C within the service life of the plate-type air and coal gas double-preheating system. The plate-type air and coal gas double-preheating system for the hot blast stove has the advantages of being high in compactness and heat transmission performance, small in system pressure head loss, high in stability, long in service life and the like, 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 hotblast stove with plate type air, gas double pre-heating system.
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.Along with the contradiction of resource scarcity, iron and steel, petroleum industry to the device energy efficiency, comprise that process choice, lectotype selection and energy recovery etc. have all proposed more and more stricter requirement both at home and abroad.The interchanger that tubular type, heat pipe-type, rotary type etc. are traditional leaks out due to ubiquity dust deposition, heat pipe failure, burn into and the problem such as bulky, can not satisfy the requirement of energy efficiency and environment protection in a lot of occasions.
The preheater of two pre-thermal recoveries is heat-pipe heat exchanger substantially at present.The heat pipe-type preheater is the technology of China's the eighties in last century, when being is convenient to make, meet the manufacture level of China due to heat pipe, China has just begun to use in chemical industry, steel industry is to begin to use in late nineteen nineties in last century, have the unfavorable factors such as heating agent loss, venting, heat pipe can lose efficacy because vacuum tightness descends.If use temperature too high (380 ℃ time) just must adopt more expensive working medium and the high-temperature material heat pipe of price, cause equipment manufacturing cost too high, booster easily appears, and temperature too low (below 140 ℃) produces again dewing corrosion.Seriously restricted the work-ing life of equipment.Because heat pipe failure is difficult to judge, generally need all heat pipes are again vacuumized or change, maintenance cost is high, and the turnaround is long, indirectly causes larger financial loss.The hot tube heat exchanger that is added with fin also has other some weakness, such as, the row of heat pipe can not be excessive, and fin dust stratification and easy-clear have not only reduced heat transfer effect, can stop up when serious, and impact is normally produced.Be generally 3～5 years the work-ing life of heat pipe-type preheater.This is also the reason that above-mentioned situation appears in the heat-pipe heat exchanger of our present use.When just going into operation, air, coal gas can be preheating to 160～170 ℃, then lose efficacy year by year.Because causing a large amount of fume afterheat energy, inefficiency is wasted.Plate type preheater 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.Can steadily in the long term air and coal gas be preheating to respectively 200 ℃ of left and right, so hotblast stove can realize take Experience of Using Single Bf Gas as fuel, make wind-warm syndrome reach the ability of 1200 ℃.Can reduce iron coke per ton ratio 27～34Kg/ ton iron, increase the iron amount 5～7% of producing, increase injecting coal quantity 27～34Kg/ ton iron, also solve the problem of diffusing of blast furnace gas, reduce environmental pollution, bring huge economic benefit to the user.
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, thermo-efficiency high, can effectively improve temperature into the freezing air of hotblast stove and inflammable gas, the hotblast stove that reduces equipment energy consumption is with plate type air, gas double pre-heating system.
The objective of the invention is to realize by following measures: a kind of hotblast stove is with plate type air, gas double pre-heating system, comprise plate air preheater, board-like gas preheater, chimney, it is characterized in that also having 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, 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, described flue input pipeline section is fishplate bar regenerative air heater flue gas input port respectively, the flue gas input port of board-like gas preheater, flue bypass pipeline section, 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 plate air preheater flue gas input/output port pipeline section, board-like gas preheater flue input/output port pipeline section, flue bypass pipeline section is equipped with control valve, described flue pipeline input tube section, flue pipeline output tube 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 by gas line I/O 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/output end port of described board-like gas preheater connects respectively gas line I/O pipeline section, gas line bypass pipeline section is connected between gas line I/O pipeline section, the coal gas input port pipeline section of described board-like gas preheater, the output pipeline section is equipped with control valve separately, gas line bypass pipeline section is equipped with control valve, described gas line I/O pipeline section is equipped with thermometric/load cell.
Compared with prior art, the hotblast stove that the present invention proposes is with plate type air, gas double pre-heating system, and have following advantage: 1) native system is simple, compact, and operating mode stability is high, not generation performance decay within work-ing life; 2) easy to operate, easy care maintenance, system's regulating power are strong, and the temperature that can regulate as required air, coal gas satisfies need of production; 3) system condition is stable, and is within work-ing life, sustainable stable with air, gas preheating to 180～200 ℃.Native system has the advantages such as compactness is high, heat transfer property is high, the system head loss is little, stability is high, the life-span is long, 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 hotblast stove comprises plate air preheater 7, board-like gas preheater 14, chimney 10, flue gas pipeline and Controlling System, airline and Controlling System, gaspipe line and Controlling System with plate type air, gas double pre-heating system; Wherein:
described flue gas pipeline and Controlling System are by flue 30 I/O pipeline sections, plate air preheater 7 flue gas input/output end ports, the flue gas input/output end port of board-like gas preheater 14, flue 30 bypass pipeline sections, chimney 10, some control valves, some thermometrics/load cell forms, described flue 30 input pipeline sections are fishplate bar regenerative air heater 7 flue gas input ports respectively, the flue gas input port of board-like gas preheater 14, flue 30 bypass pipeline sections, plate air preheater 7 flue gas output ports, the flue gas output port of board-like gas preheater 14, the splice connection of flue gas duct bypass pipeline section is to flue 30 output pipeline sections, flue 30 output pipeline sections are connected with chimney 10, described plate air preheater 7 flue gas input/output port pipeline sections are equipped with control valve 20/31, board-like gas preheater 14 flue input/output port pipeline sections are equipped with control valve 17/12, flue 30 bypass pipeline sections are equipped with control valve 16, described flue 30 input pipeline sections, flue 30 output pipeline sections are equipped with thermometric/load cell 2, plate air preheater 7 flue gas output port pipeline sections, the flue gas delivery port pipeline section of board-like gas preheater 14 is equipped with temperature element 2b.In this flue gas pipeline, the hotblast stove high-temperature flue gas enters respectively plate type air, gas preheater discharges sensible heat, by the distribution of inlet adjusting valve regulation flue gas heat, and flue-gas temperature is reduced to 140～150 ℃ of left and right enters chimney, realize the recovery of the waste heat energy.Each pipeline temperature and pressure detecting signal are sent into the DCS Controlling System, by the discriminatory analysis to detection signal and data, to implement above regulating step, to reach rational preheating temperature and stable operating mode.The high-temperature flue gas that hotblast stove produces discharges after waste heat temperature and is reduced to 140～150 ℃ and enters chimney in preheater.
described airline and Controlling System are by air line 28 I/O pipeline sections, the air input/output end port of plate air preheater 14, air line 28 bypass pipeline sections, some control valves, some thermometrics/load cell forms, the air input/output end port of described plate air preheater 14 connects respectively air line 28 I/O pipeline sections, 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 7 is equipped with control valve 13/15, the air by-pass pipeline section is equipped with control valve 19, described air line 28 input pipeline sections, on air line 28 output pipeline sections, thermometric/load cell 2 is installed separately.In this airline, the plate air preheater air arranges regulated valve on port pipeline section and bypass pipeline section, and plate air preheater is into and out of port set temperature and pressure detection and access control system.The normal temperature combustion air is warming up to 180 ℃～200 ℃ after by plate air preheater, realizes the preheating to combustion air.In addition, by regulating air line bypass pipeline section valve, pressure and the preheating temperature of airline are regulated.
described gaspipe line and Controlling System are by gas line 29 I/O pipeline sections, the coal gas input/output end port of board-like gas preheater 7, gas line 29 bypass pipeline sections, some control valves, some thermometric load cells 2 form, the coal gas input/output end port of described board-like gas preheater 7 connects respectively gas line 29 I/O pipeline sections, gas line 29 bypass pipeline sections are connected between gas line 29 I/O pipeline sections, the coal gas input port pipeline section of described board-like gas preheater 7 is equipped with control valve 5, the output pipeline section is equipped with control valve 3, gas line 29 bypass pipeline sections are equipped with control valve 4, described gas line 29 I/O pipeline sections are equipped with thermometric/load cell 2.In this gas line, on board-like gas preheater coal gas import and export and by-pass line, regulated valve is set, plate air preheater import and export end set temperature and pressure detection and access control system.Blast furnace gas is warming up to 180 ℃～200 ℃ after by board-like gas preheater, realizes the preheating to blast furnace gas.By regulating gas line bypass pipeline section control valve, pressure, flow and the preheating temperature of gaspipe line are regulated.
The present invention is by the preheating method that adopts plate type air, gas preheater and utilizes relevant instrument control, pipeline and valve system to solve the deficiency of the technical and system of other types preheater.Utilize the waste heat of stack gases to come warm-up combustion-supporting air and coal gas, with physical thermal, the raising theoretical combustion temperature that reaches increase combustion air and coal gas, and then the purpose of raising hotblast stove wind pushing temperature.Hotblast stove of the present invention can be realized reaching the draft capacity more than 1200 ℃ take Experience of Using Single Bf Gas as fuel; System stability is high, when flue-gas temperature fluctuates widely, still fume afterheat can be reclaimed; System reliability is strong, without middle heat catalysis matter, and the sustainable design effect that reaches.
During the plate type air of native system, gas double system operation, the high-temperature flue gas that hotblast stove produces, low temperature combustion air, coal gas are 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, realizes the requirement that system's energy recovery is utilized; Native system can be realized the advantages such as whole pre-heating system resistance to flow is little, pre-heat effect is steady in a long-term, to no effect decay, long service life, less scaling, maintenance workload is little owing to adopting plate type preheater.
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 (1)
1. a hotblast stove with plate type air, gas double pre-heating system, comprises plate air preheater, board-like gas preheater, chimney, it is characterized in that also having 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, 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, described flue input pipeline section is fishplate bar regenerative air heater flue gas input port respectively, the flue gas input port of board-like gas preheater, flue bypass pipeline section, 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 plate air preheater flue gas input/output port pipeline section, board-like gas preheater flue input/output port pipeline section, flue bypass pipeline section is equipped with control valve, described flue pipeline input tube section, flue pipeline output tube 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 by gas line I/O 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/output end port of described board-like gas preheater connects respectively gas line I/O pipeline section, gas line bypass pipeline section is connected between gas line I/O pipeline section, the coal gas input port pipeline section of described board-like gas preheater, the output pipeline section is equipped with control valve separately, gas line bypass pipeline section is equipped with control valve, described gas line I/O pipeline section is equipped with thermometric/load cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110393584XA CN103131812A (en) | 2011-12-01 | 2011-12-01 | Plate-type air and coal gas double-preheating system for hot blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110393584XA CN103131812A (en) | 2011-12-01 | 2011-12-01 | Plate-type air and coal gas double-preheating system for hot blast stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103131812A true CN103131812A (en) | 2013-06-05 |
Family
ID=48492260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110393584XA Pending CN103131812A (en) | 2011-12-01 | 2011-12-01 | Plate-type air and coal gas double-preheating system for hot blast stove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103131812A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105238901A (en) * | 2015-09-30 | 2016-01-13 | 北京首钢国际工程技术有限公司 | Multipurpose hot blast stove high-temperature preheating system |
| CN106855237A (en) * | 2017-01-23 | 2017-06-16 | 北京联力源科技有限公司 | The burning chemistry chains system and its operation method of emission coal gas |
| CN107354255A (en) * | 2017-06-26 | 2017-11-17 | 北京首钢股份有限公司 | A kind of method for extending coal gas plate type preheater service life |
| CN111304393A (en) * | 2020-04-02 | 2020-06-19 | 广东韶钢松山股份有限公司 | Method for checking main technological parameters of plate heat exchanger |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928797A (en) * | 2010-07-29 | 2010-12-29 | 江苏中天能源设备有限公司 | High-blast-temperature energy-saving and emission-reducing combined type preheating system for blast furnace |
| 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 |
| CN202390464U (en) * | 2011-12-01 | 2012-08-22 | 上海雷林工程技术有限公司 | Plate-type air and gas double pre-heating system for hot-blast stove |
-
2011
- 2011-12-01 CN CN201110393584XA patent/CN103131812A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928797A (en) * | 2010-07-29 | 2010-12-29 | 江苏中天能源设备有限公司 | High-blast-temperature energy-saving and emission-reducing combined type preheating system for blast furnace |
| 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 |
| CN202390464U (en) * | 2011-12-01 | 2012-08-22 | 上海雷林工程技术有限公司 | Plate-type air and gas double pre-heating system for hot-blast stove |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105238901A (en) * | 2015-09-30 | 2016-01-13 | 北京首钢国际工程技术有限公司 | Multipurpose hot blast stove high-temperature preheating system |
| CN106855237A (en) * | 2017-01-23 | 2017-06-16 | 北京联力源科技有限公司 | The burning chemistry chains system and its operation method of emission coal gas |
| CN107354255A (en) * | 2017-06-26 | 2017-11-17 | 北京首钢股份有限公司 | A kind of method for extending coal gas plate type preheater service life |
| CN111304393A (en) * | 2020-04-02 | 2020-06-19 | 广东韶钢松山股份有限公司 | Method for checking main technological parameters of plate heat exchanger |
| CN111304393B (en) * | 2020-04-02 | 2021-11-16 | 广东韶钢松山股份有限公司 | Method for checking main technological parameters of plate heat exchanger |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102252339B (en) | System for reducing discharge smoke temperature of power station boiler | |
| CN203082914U (en) | Air preheating device of power plant boiler | |
| CN105180146B (en) | A kind of cogeneration power plant fume afterheat is multistage to reclaim utilization system | |
| CN201297882Y (en) | Heat-pipe air preheater | |
| CN103131812A (en) | Plate-type air and coal gas double-preheating system for hot blast stove | |
| CN106765288B (en) | Graded heat exchange system of rotary air preheater of power station boiler | |
| CN208735652U (en) | The eliminating white smoke system that a kind of heat exchanger and air preheater combine | |
| CN202390464U (en) | Plate-type air and gas double pre-heating system for hot-blast stove | |
| CN101928796A (en) | High wind temperature energy saving and emission reduction combined preheating method for blast furnace | |
| CN202791953U (en) | Water pipe type condensation superheating steam generator | |
| CN202158578U (en) | Composite water circulation heat exchanger with function of exchanging heat and heating air for three times | |
| CN202390463U (en) | Gas and air synchronous double preheating system provided with auxiliary combustion furnace | |
| CN201785423U (en) | Gas preheating combined heat-pipe heat exchanger | |
| CN201785422U (en) | High-air-temperature energy-saving emission-reduction combined preheating system of blast furnace | |
| CN202390462U (en) | Coal gas and air asynchronous dual preheating system provided with additional combustion furnace | |
| CN201266035Y (en) | Pre-heating system for plate heat exchanger of hot-air furnace | |
| CN103131813A (en) | Coal gas and air asynchronous and double-preheating system with additionally arranged combustion furnace | |
| CN103131814A (en) | Coal gas and air synchronous double-preheating system with additionally arranged combustion furnace | |
| CN202757143U (en) | Air pre-heater air leakage and fuel gas recirculation device | |
| CN202002140U (en) | Forced circulation air preheating system | |
| CN111118245A (en) | High-temperature preheating system and method for hot blast stove | |
| CN103725818B (en) | A kind of hotblast stove low temperature exhaust heat degree of depth recovery system | |
| CN201028779Y (en) | Combined air preheater | |
| CN209689432U (en) | A kind of heat exchange of catalytic cracking unit desulfurization fume takes hot systems | |
| CN205137516U (en) | Air heater based on air water heat transfer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130605 |