CN202390464U - Plate-type air and gas double pre-heating system for hot-blast stove - Google Patents
Plate-type air and gas double pre-heating system for hot-blast stove Download PDFInfo
- Publication number
- CN202390464U CN202390464U CN2011204932702U CN201120493270U CN202390464U CN 202390464 U CN202390464 U CN 202390464U CN 2011204932702 U CN2011204932702 U CN 2011204932702U CN 201120493270 U CN201120493270 U CN 201120493270U CN 202390464 U CN202390464 U CN 202390464U
- Authority
- CN
- China
- Prior art keywords
- gas
- pipeline section
- flue
- air
- input
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Air Supply (AREA)
Abstract
The utility model relates to a plate-type air and gas double pre-heating system for a hot-blast stove. The plate-type air and gas double pre-heating system comprises a plate-type air pre-heater, a plate-type gas pre-heater, a chimney, a flue gas pipeline and control system, an air pipeline and control system, and a gas pipeline and control system. The plate-type air and gas double pre-heating system disclosed by the utility model has the advantages that the system is simple and compact, and high in stability of the working condition, and does not generate performance attenuation within the service life; the system is convenient in operation, easy to maintain and overhaul and strong in adjusting capability, can adjust the temperature of the air and the gas according to the requirement, and meet the production requirement, and the system is stable in work condition, can lastingly and stably preheat the air and the gas to 180-200 DEG C within the service life. The system has the advantages of high compactness, high heat transfer property, small pressure head loss of the system, high stability, long service life and the like, and is a propagable project.
Description
Technical field:
The utility model relates to a kind of smelting of iron and steel, particularly relates to a kind of hotblast stove with plate type air, gas double pre-heating system.
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.Along with the contradiction of resource scarcity becomes increasingly conspicuous, iron and steel, petroleum industry comprise that to the device energy efficiency process choice, lectotype selection and energy recovery etc. have all proposed more and more stricter requirement both at home and abroad.Traditional interchanger such as tubular type, heat pipe-type, rotary type is because the coking of ubiquity dust stratification, heat pipe failure, burn into leaks out and problem such as bulky, can not satisfy energy efficiency and requirement on environmental protection in a lot of occasions.
The preheater that at present two preheatings are adopted is heat-pipe heat exchanger basically.The heat pipe-type preheater is the technology of China's the eighties in last century; When being the manufacture level of being convenient to make, meet China owing 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, has unfavorable factors such as heating agent loss, venting, and heat pipe can lose efficacy because of vacuum tightness descends.If use temperature too high (380 ℃ time) just must adopt price expensive working medium and high-temperature material heat pipe, cause equipment manufacturing cost too high, booster appears easily, and temperature low excessively (below 140 ℃) produces dewing corrosion again.Seriously restricted the work-ing life of equipment.Because heat pipe failure is difficult to judge that need all heat pipes be vacuumized again or change generally speaking, maintenance cost is high, the turnaround is long, causes bigger financial loss indirectly.The hot tube heat exchanger that is added with fin also has other some weakness, such as, row's number of heat pipe can not be excessive, and fin dust stratification and easy-clear have not only reduced the heat exchange effect, can stop up when serious, influence ordinary production.Be generally the work-ing life of heat pipe-type preheater 3～5 years.This also is the reason that above-mentioned situation appears in the heat-pipe heat exchanger of our present usefulness.Air, coal gas can be preheating to 160～170 ℃ when just going into operation, and lose efficacy year by year then.Because inefficiency causes a large amount of fume afterheat energy to be wasted.Plate type preheater 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.Can steadily in the long term air and coal gas be preheating to respectively about 200 ℃, so hotblast stove can realize that with single blast furnace gas be fuel, make wind-warm syndrome reach 1200 ℃ ability.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.
The utility model content:
The purpose of the utility model be provide to the prior art weak point that a kind of rational in infrastructure, reliable operation, thermo-efficiency are high, the temperature of the freezing air that can effectively improve hotblast stove into and inflammable gas, reduce equipment energy consumption hotblast stove with plate type air, gas double pre-heating system.
The purpose of the utility model is to realize through following measure: a kind of hotblast stove is with plate type air, gas double pre-heating system; Comprise plate air preheater, board-like gas preheating device, chimney; It is characterized in that also having flue gas pipeline and system, airline and system, gaspipe line and system; Wherein:
Said flue gas pipeline and 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 preheating device; Flue bypass pipeline section; Chimney, plurality of control valves, some thermometrics/load cell is formed; Said flue input pipeline section is fishplate bar regenerative air heater flue gas input port, the flue gas input port of board-like gas preheating device, flue bypass pipeline section respectively; 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, and said plate air preheater flue gas output/input port pipeline section, board-like gas preheating device flue output/input port 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, and the flue gas output port pipeline section of plate air preheater flue gas output port pipeline section, 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, and 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; Air line bypass pipeline section is equipped with valve separately, 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 by gas line I/O pipeline section; 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/output end port of said board-like gas preheating device connects gas line I/O pipeline section respectively, and gas line bypass pipeline section is connected between the gas line I/O pipeline section, and the coal gas input port pipeline section of said board-like gas preheating device, output pipeline section are equipped with valve separately; Gas line bypass pipeline section is equipped with valve, and said gas line I/O pipeline section is equipped with thermometric/load cell.
Compared with prior art, the hotblast stove that the utility model 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, and performance degradation did not take place in work-ing life; 2) easy to operate, easy care maintenance, system's regulating power are strong, can regulate air, temperature of gas as required, satisfy the production needs; 3) system condition is stable, in work-ing life, Sustainable Stability with air, gas preheating to 180～200 ℃.Native system has advantages such as compactness height, 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 synoptic diagram that the utility model proposes.
Embodiment:
Below in conjunction with accompanying drawing embodiment is elaborated: at an embodiment of the utility model shown in Figure 1.Among the figure, a kind of hotblast stove comprises plate air preheater 7, board-like gas preheating device 14, chimney 10, flue gas pipeline and system, airline and system, gaspipe line and system with plate type air, gas double pre-heating system; Wherein:
Said flue gas pipeline and 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 preheating device 14; Flue 30 bypass pipeline sections; Chimney 10, plurality of control valves, some thermometrics/load cell is formed; Said flue 30 input pipeline sections are fishplate bar regenerative air heater 7 flue gas input ports, the flue gas input port of board-like gas preheating device 14, flue 30 bypass pipeline sections respectively; The flue gas output port of plate air preheater 7 flue gas output ports, board-like gas preheating device 14, the splice connection of flue gas duct bypass pipeline section are to flue 30 output pipeline sections, and flue 30 output pipeline sections link to each other with chimney 10, and said plate air preheater 7 flue gas output/input port pipeline sections are equipped with valve 20/31; Board-like gas preheating device 14 flue output/input port pipeline sections are equipped with valve 17/12; Flue 30 bypass pipeline sections are equipped with valve 16, and said flue 30 input pipeline sections, flue 30 output pipeline sections are equipped with thermometric/load cell 2, and the flue gas delivery port pipeline section of plate air preheater 7 flue gas output port pipeline sections, board-like gas preheating device 14 is equipped with temperature element 2b.In this flue gas pipeline; The hotblast stove high-temperature flue gas gets into plate type air respectively, the gas preheating device discharges sensible heat; Through the distribution of inlet adjusting valve regulation flue gas heat, and flue-gas temperature is reduced to about 140～150 ℃ enters chimney, realize the recovery of the waste heat energy.Each pipeline temperature and pressure detecting signal are sent into the DCS system, through the discriminatory analysis to detection signal and data, to implement above regulating step, to reach reasonable preheating temperature and stable operating mode.The high-temperature flue gas that hotblast stove produces discharges behind the waste heat temperature and is reduced to 140～150 ℃ and enters chimney in preheater.
Said airline and 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; Plurality of control valves, some thermometrics, load cell are formed, and the air input/output end port of said plate air preheater 14 connects air line 28 I/O pipeline sections 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 7 is equipped with valve 13/15, and the air by-pass pipeline section is equipped with valve 19, on said air line 28 input pipeline sections, the air line 28 output pipeline sections thermometric/load cell 2 is installed separately.In this airline, the plate air preheater air is provided with regulated valve on port pipeline section and bypass pipeline section, and plate air preheater is provided with temperature and pressure detection and access control system into and out of port.The normal temperature combustion air is warming up to 180 ℃～200 ℃ after through plate air preheater, realizes the preheating to combustion air.In addition, through regulating air line bypass pipeline section valve the pressure and the preheating temperature of airline are regulated.
Said gaspipe line and system are by gas line 29 I/O pipeline sections; The coal gas input/output end port of board-like gas preheating device 7; Gas line 29 bypass pipeline sections, plurality of control valves, some thermometric load cells 2 are formed; The coal gas input/output end port of said board-like gas preheating device 7 connects gas line 29 I/O pipeline sections respectively; Gas line 29 bypass pipeline sections are connected between the gas line 29 I/O pipeline sections; The coal gas input port pipeline section of said board-like gas preheating device 7 is equipped with valve 5, the output pipeline section is equipped with valve 3, and gas line 29 bypass pipeline sections are equipped with valve 4, and said gas line 29 I/O pipeline sections are equipped with thermometric/load cell 2.In this gas line, on board-like gas preheating device coal gas import and export and the by-pass line regulated valve is set, plate air preheater import and export end is provided with temperature and pressure detection and access control system.Blast furnace gas is warming up to 180 ℃～200 ℃ after through board-like gas preheating device, realizes the preheating to blast furnace gas.Through regulating gas line bypass pipeline section valve pressure, flow and the preheating temperature of gaspipe line are regulated.
The utility model is through the preheating method that adopts plate type air, gas preheating device 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, the physics that increases combustion air and coal gas is warm to reach, the raising theoretical combustion temperature, and then improves the purpose of hotblast stove wind pushing temperature.The hotblast stove of the utility model can realize that with single blast furnace gas be fuel, reaches the draft capacity more than 1200 ℃; System stability is high, when flue-gas temperature fluctuates widely, still can fume afterheat be reclaimed; System reliability is strong, heat catalysis matter in the middle of not having, 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 through the corrugated board cluster of plate type preheater; In the passage that section constantly changes, add strong disturbance, 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, realizes the requirement that system's energy recovery is utilized; Native system is owing to adopt plate type preheater, can realize that whole pre-heating system resistance to flow is little, pre-heat effect is steady in a long-term, decay to no effect, long service life, less scaling, advantage such as maintenance workload is little.
Combine accompanying drawing to describe the embodiment of the utility model above; The structure that embodiment provides does not constitute the restriction to the utility model, 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 (1)
1. a hotblast stove comprises plate air preheater, board-like gas preheating device, chimney with plate type air, gas double pre-heating system, it is characterized in that, also has flue gas pipeline and system, airline and system, gaspipe line and system; Wherein:
Said flue gas pipeline and 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 preheating device; Flue bypass pipeline section; Chimney, plurality of control valves, some thermometrics/load cell is formed; Said flue input pipeline section is fishplate bar regenerative air heater flue gas input port, the flue gas input port of board-like gas preheating device, flue bypass pipeline section respectively; 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, and said plate air preheater flue gas output/input port pipeline section, board-like gas preheating device flue output/input port 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, and the flue gas output port pipeline section of plate air preheater flue gas output port pipeline section, 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, and 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; Air line bypass pipeline section is equipped with valve separately, 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 by gas line I/O pipeline section; 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/output end port of said board-like gas preheating device connects gas line I/O pipeline section respectively, and gas line bypass pipeline section is connected between the gas line I/O pipeline section, and the coal gas input port pipeline section of said board-like gas preheating device, output pipeline section are equipped with valve separately; Gas line bypass pipeline section is equipped with valve, and said gas line I/O pipeline section is equipped with thermometric/load cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204932702U CN202390464U (en) | 2011-12-01 | 2011-12-01 | Plate-type air and gas double pre-heating system for hot-blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204932702U CN202390464U (en) | 2011-12-01 | 2011-12-01 | Plate-type air and gas double pre-heating system for hot-blast stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202390464U true CN202390464U (en) | 2012-08-22 |
Family
ID=46665401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204932702U Expired - Lifetime CN202390464U (en) | 2011-12-01 | 2011-12-01 | Plate-type air and gas double pre-heating system for hot-blast stove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202390464U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131812A (en) * | 2011-12-01 | 2013-06-05 | 上海雷林工程技术有限公司 | Plate-type air and coal gas double-preheating system for hot blast stove |
-
2011
- 2011-12-01 CN CN2011204932702U patent/CN202390464U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131812A (en) * | 2011-12-01 | 2013-06-05 | 上海雷林工程技术有限公司 | Plate-type air and coal gas double-preheating system for hot blast stove |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102252339B (en) | System for reducing discharge smoke temperature of power station boiler | |
| CN103925823B (en) | Multilevel heat accumulation system | |
| CN105180146B (en) | A kind of cogeneration power plant fume afterheat is multistage to reclaim utilization system | |
| CN201297882Y (en) | Heat-pipe air preheater | |
| CN101846459A (en) | Method for recycling waste heat of flue gas of heating furnace and heating furnace system | |
| CN103131812A (en) | Plate-type air and coal gas double-preheating system for hot blast stove | |
| CN201305608Y (en) | Hot-blast furnace cascade system of preheating | |
| CN106765288B (en) | Graded heat exchange system of rotary air preheater of power station boiler | |
| 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 | |
| CN208735652U (en) | The eliminating white smoke system that a kind of heat exchanger and air preheater combine | |
| CN103134044A (en) | Method and device capable of improving efficiency of thermal power unit by cascade utilization of boiler smoke waste heat | |
| CN202692728U (en) | Waste heat utilization system of calcination furnace | |
| CN202158578U (en) | Composite water circulation heat exchanger with function of exchanging heat and heating air for three times | |
| CN201785423U (en) | Gas preheating combined heat-pipe heat exchanger | |
| CN201266035Y (en) | Pre-heating system for plate heat exchanger of hot-air furnace | |
| CN201785422U (en) | High-air-temperature energy-saving emission-reduction combined preheating system of blast furnace | |
| CN202390463U (en) | Gas and air synchronous double preheating system provided with auxiliary combustion furnace | |
| CN204962712U (en) | System is used multipurposely in multistage recovery of cogeneration of heat and power power plant flue gas waste heat | |
| CN202390462U (en) | Coal gas and air asynchronous dual preheating system provided with additional combustion furnace | |
| CN210215414U (en) | Blast furnace coal powder injection and hot blast stove air/coal gas series preheating system | |
| CN202757143U (en) | Air pre-heater air leakage and fuel gas recirculation device | |
| 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 | |
| CN111720998A (en) | Mine fresh air comprehensive heating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180425 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. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120822 |