CN202733934U - Air preheater - Google Patents

Air preheater Download PDF

Info

Publication number
CN202733934U
CN202733934U CN2012203760436U CN201220376043U CN202733934U CN 202733934 U CN202733934 U CN 202733934U CN 2012203760436 U CN2012203760436 U CN 2012203760436U CN 201220376043 U CN201220376043 U CN 201220376043U CN 202733934 U CN202733934 U CN 202733934U
Authority
CN
China
Prior art keywords
flue gas
air
cavity
gravity assisted
outlet
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 - Fee Related
Application number
CN2012203760436U
Other languages
Chinese (zh)
Inventor
陈燕才
张雪荣
李华
胡诚
严开勇
陈良
万险峰
李恒山
李良洪
谢斌
何国赛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan Iron and Steel Co Ltd
Original Assignee
Wuhan Iron and Steel Group Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wuhan Iron and Steel Group Corp filed Critical Wuhan Iron and Steel Group Corp
Priority to CN2012203760436U priority Critical patent/CN202733934U/en
Application granted granted Critical
Publication of CN202733934U publication Critical patent/CN202733934U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The utility model relates to an air preheater which comprises an air through cavity and a flue gas through cavity, wherein a partition plate which is used for preventing gas carry-over from happening between the two through cavities is arranged between the air through cavity and the flue gas through cavity, one or a plurality of gravity assisted heat pipes are mounted on the partition plate, an air inlet of the air through cavity is communicated with an exhaust port of a draught fan, and a thermometer which is used for measuring temperature of preheated air is arranged at the position of an air outlet of the air through cavity. A flue gas outlet of the flue gas through cavity is communicated with a tail flue gas exhaust port of a cast steel plate (CSP) factory roller hearth heating furnace, a flue gas outlet of the flue gas through cavity is communicated with a chimney through a branch flue gas regulation valve, and a main flue gas regulation valve is further arranged between the tail flue gas exhaust port of the CSP factory roller hearth heating furnace and the chimney. According to the air preheater, air is preheated by waste heat of high-temperature tail flue gas of the CSP factory roller hearth heating furnace, preheating temperature can be controlled and adjusted, structure is simple, operation and maintenance are convenient, and heat exchange efficiency is high.

Description

Air preheater
Technical field
The utility model relates to a kind of CSP(of being applied to CSP) air preheater in factory's roller hearth type heating furnace tail flue gas heat recovery.
Background technology
The close-coupled output strip line is called for short CSP (Compact Strip Production).Refer to the thin sheet continuous casting base that 50 ~ 80 mm are thick, shear after going out conticaster, enter roller hearth type heating furnace, it is rear for continuous rolling to come out of the stove.This technique had both taken full advantage of the heat energy of strand, relied on again specific function and the effect of roller hearth type heating furnace, made the smooth and easy production of continuous casting and tandem rolling, therefore, and worldwide just by progressively promotion and application.
The function of roller hearth type heating furnace is a lot of in the CSP product line, and one of them is exactly to receive continuously the high temperature slab that casting machine is produced, and it is heated and soaking.At present, temperature is still up to 400 ~ 500 ℃ after the treated utilization of tail flue gas that the roller hearth type heating furnace burning produces, and this part tail flue gas is directly to be discharged in the atmosphere now, has both caused the massive losses of heat, produces again the greenhouse effects contaminated environment.Therefore, how recycling this part fume afterheat, reach the purpose of energy-saving and emission-reduction, is the problem that production manufacturer and each research institution need solution badly.Publication number is CN 201322564Y, open day is on October 7th, 2009, patent name be air preheater patent disclosure a kind of waste heat gas that utilizes bell furnace air preheater of air being carried out preheating, this device adopts seamless steel pipe to make heat exchanger tube, and at tube wall outside welding helical fin, to increase heat transfer area.Compare with common heat exchanger, this device heat exchange efficiency increases, but still has following shortcomings: the one, and the preheating of air temperature can't be regulated, and can not satisfy some particular demands.The 2nd, this apparatus structure is comparatively complicated, makes relatively difficulty of processing.The 3rd, this device heat exchange efficiency remains further to be improved.The 4th, entrained dust easily converges in the exhanst gas outlet pars infrasegmentalis of this device in the flue gas, the inconvenience cleaning, and repair and maintenance is very inconvenient.
The utility model content
Technical problem to be solved in the utility model provides a kind of air preheater, this air preheater utilizes CSP factory roller hearth type heating furnace afterbody high-temperature flue gas waste heat that air is carried out preheating, and preheat temperature is controlled, adjustable, simple in structure, convenient operating maintenance, and heat exchange efficiency is high.
The technical scheme that the utility model adopts is: a kind of air preheater, and it includes air cavity and flue gas cavity, is provided with the dividing plate that prevents two cavity gas blowbies between air cavity and flue gas cavity; One or more gravity assisted heat pipes are installed on the described dividing plate, and the heat release section of gravity assisted heat pipe places in the air cavity, and the endotherm section of gravity assisted heat pipe places in the flue gas cavity; The air intake of described air cavity is connected with the outlet of blower fan, and the air outlet slit place of air cavity is provided with the thermometer for the air themperature after the measurement preheating; The smoke inlet of described flue gas cavity is connected with the outlet of CSP factory roller hearth type heating furnace tail flue gas, and the exhanst gas outlet of flue gas cavity is connected with chimney by a minute smoke regulating valve; Between the outlet of CSP factory roller hearth type heating furnace tail flue gas and chimney, also be provided with total smoke regulating valve.
Press such scheme, the surface high frequency of described gravity assisted heat pipe is welded with some to increase the flat fin of heat transfer area.
Press such scheme, described gravity assisted heat pipe is round sealed formula gravity assisted heat pipe, is pumped into 1 ~ 2 * 10 in the sealed tube -4The negative pressure of Pa, and in pipe, fill with an amount of liquid heat transfer medium-inorganic salts; The pipe fitting material of described gravity assisted heat pipe is carbon steel.
Press such scheme, be provided with a plurality of shoot doors in the described flue gas cavity.
Press such scheme, the smoke inlet place of described flue gas cavity is provided with and guarantees rationally even gas baffle by heat exchange zone of flue gas.
In the utility model, gravity assisted heat pipe is divided into two sections, and hypomere is endotherm section, and epimere is heat release section.When high-temperature flue gas washed away endotherm section, intraluminal fluid attitude heat transfer medium absorbing heat became gaseous state by liquid state, and medium rises to heat release section, outwards emit heat, the heat that discharges is absorbed by the cold air that blower fan is blown into, and self is condensed into liquid medium, returns endotherm section along tube wall under action of gravitation.Because be vacuum state in the pipe, thermal resistance is very little, so heat pipe has isothermal characteristics, namely the top and bottom temperature difference is very little, and superconducting characteristic is arranged, and heat exchange efficiency is high.
The gravity assisted heat pipe surface high frequency is welded with fin, and the fin surface structure is flat wing, and material adopts heat-resisting steel disc.Flat fin and gravity assisted heat pipe adopt the method for ratio-frequency welding to weld together.In the process, the high-frequency electrical induction that utilizes radio-frequency generator to produce makes the surface of gravity assisted heat pipe and flat fin contact position produce high temperature, in the depth bounds about 10um both is dissolved, and pressurization is connected as a single entity flat fin and gravity assisted heat pipe again.
The place arranges gas baffle at smoke inlet, guarantees that flue gas rationally evenly by heat exchange zone, makes heat transfer effect reach best, and the many places shoot door is set in the flue gas cavity, makes things convenient for the maintenance of equipment.
Total smoke regulating valve can independently be regulated with a minute smoke regulating valve, but also mutual linking.
The beneficial effects of the utility model are: 1, directly reclaim the afterbody high-temperature flue gas waste heat that CSP factory roller hearth type heating furnace is discharged, be used for preheating cold air, air themperature can be regulated voluntarily after the heating, both can be used to the roll of CSP factory is carried out preheating, also can heat to operating room in the winter time, not only reduce heat loss, improve efficiency of utilization, and reduced production cost, reduced environmental pollution.2, be vacuum state in the pipe of gravity assisted heat pipe, thermal resistance is very little, so heat pipe has isothermal characteristics, namely the top and bottom temperature difference is very little, and superconducting characteristic is arranged, and heat exchange efficiency is high.3, the gas approach place arranges gas baffle, guarantees that flue gas rationally evenly by heat exchange zone, makes heat transfer effect reach best.4, be provided with the many places shoot door, make things convenient for the repair and maintenance of equipment.5, total smoke regulating valve and a minute smoke regulating valve are used, thereby reach the purpose of regulating preheat temperature.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the utility model.
Fig. 2 is the structural representation of the utility model air cavity and flue gas cavity.
Among the figure: 1, thermometer, 2, air outlet slit, 3, the air cavity, 4, flat fin, 5, air intake, 6, total smoke regulating valve, 7, heat release section, 8, endotherm section, 9, minute smoke regulating valve, 10, exhanst gas outlet, 11, gravity assisted heat pipe, 12, heat transfer medium, 13, the flue gas cavity, 14, shoot door, 15, smoke inlet, 16, dividing plate, 17, blower fan, 18, CSP factory roller hearth type heating furnace tail flue gas, 19, chimney.
The specific embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing.
Referring to Fig. 1 and Fig. 2, a kind of air preheater, it includes air cavity 3 and flue gas cavity 13.The right side of described air cavity 3 is provided with air intake 5, and this entrance is connected with the outlet of blower fan 17; The left side of air cavity 3 is provided with air outlet slit 2, is provided with the thermometer 1 for the air themperature after measuring preheating at air outlet slit 2 places.The left side of described flue gas cavity 13 is provided with smoke inlet 15, and this entrance is connected with the outlet of CSP factory roller hearth type heating furnace tail flue gas 18; The right side of flue gas cavity 13 is provided with exhanst gas outlet 10, and exhanst gas outlet 10 is connected with chimney 19 by a minute smoke regulating valve 9, and this minute, smoke regulating valve was for controlling the exhaust gas volumn that enters heat exchanger.At air cavity 3 and the flue gas cavity 13 middle dividing plates 16 that prevent two cavity gas blowbies that are provided with.At dividing plate 16 several gravity assisted heat pipes 11 are installed, gravity assisted heat pipe 11 forms by two sections: hypomere is endotherm section 8, and epimere is heat release section 7, is pumped into 1 ~ 2 * 10 in the pipe -4The negative pressure of Pa, and fill an amount of liquid heat transfer medium 12; Surface high frequency at gravity assisted heat pipe is welded with some to increase the flat fin 4 of heat transfer area.Total smoke regulating valve 6 is set, the air themperature after total smoke regulating valve 6 and minute smoke regulating valve 9 co-controlling preheatings in the pipeline between CSP factory roller hearth type heating furnace tail flue gas 18 and chimney 19.
In the present embodiment, in flue gas cavity 13, be provided with a plurality of shoot doors 14, make things convenient for the maintenance of equipment.Smoke inlet 15 places of described flue gas cavity 13 are provided with and guarantee rationally even gas baffle by heat exchange zone of flue gas.Described gravity assisted heat pipe 11 is round sealed formula gravity assisted heat pipe, and the pipe fitting material is carbon steel.
During work, CSP factory roller hearth type heating furnace tail flue gas partly enters chimney 19 through total smoke regulating valve 6, directly enters in the air.The part high-temperature flue gas enters flue gas cavity 13 through smoke inlet 15, and the gravity assisted heat pipe 8 of flowing through carries out heat exchange, exchange low-temperature flue gas after complete through exhanst gas outlet 10, minute smoke regulating valve 9 after, enter chimney 19, directly enter in the air.Gravity assisted heat pipe 8 is under the washing away of high-temperature flue gas, and endotherm section 8 begins absorbing heats, and intraluminal fluid attitude heat transfer medium 12 absorbing heats become gaseous state, rise to heat release section 7.At this moment, blow the heat that absorbs heat release section 7 releases toward the cold air of air cavity 3 by blower fan 17, become hot-air, discharge through air outlet slit 2, the hot-air of discharge can be detected by thermometer 1.After liquid heat transfer medium 12 release heat of heat release section 7, be condensed into liquid state by gaseous state, under action of gravitation, turn back to endotherm section 8 along the tube wall inboard of gravity assisted heat pipe 11, liquid heat transfer medium 12 forms self-loopa in the whole course of work.
In said process, adjusting is contained in the aperture of minute smoke regulating valve 9 of total smoke regulating valve 6 of high-temperature flue gas outlet and low-temperature flue gas outlet can carry out regulation and control to the temperature that heats rear hot-air: when the temperature drift of hot-air after the preheating, can tune up the aperture and the aperture of turning minute control valve 9 down of total smoke regulating valve 6, most of high-temperature flue gas is directly discharged by the high-temperature flue gas outlet, enter the high-temperature flue gas that participates in heat exchange in the air preheater with minimizing, and reduce the time of staying of high-temperature flue gas in air preheater; When the temperature of hot-air after the preheating is on the low side, can turn the aperture and the aperture that tunes up minute control valve 9 of total smoke regulating valve 6 down, most of high-temperature flue gas is entered participate in heat exchange in the air preheater, and prolong the time of staying of high-temperature flue gas in air preheater.
In addition, for ease of inspection and maintenance, be provided with several shoot doors 14 at the flue gas cavity, after entrained dust converges in flue gas cavity bottom in the flue gas, can clear up by shoot door 14.
The above; only being preferred embodiment of the present utility model, is not that the utility model is done any pro forma restriction, and those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification; equivalent variations or modification all drop in the protection domain of the present utility model.

Claims (5)

1. an air preheater is characterized in that: include air cavity and flue gas cavity, be provided with the dividing plate that prevents two cavity gas blowbies between air cavity and flue gas cavity; One or more gravity assisted heat pipes are installed on the described dividing plate, and the heat release section of gravity assisted heat pipe places in the air cavity, and the endotherm section of gravity assisted heat pipe places in the flue gas cavity; The air intake of described air cavity is connected with the outlet of blower fan, and the air outlet slit place of air cavity is provided with the thermometer for the air themperature after the measurement preheating; The smoke inlet of described flue gas cavity is connected with the outlet of CSP factory roller hearth type heating furnace tail flue gas, and the exhanst gas outlet of flue gas cavity is connected with chimney by a minute smoke regulating valve; Between the outlet of CSP factory roller hearth type heating furnace tail flue gas and chimney, also be provided with total smoke regulating valve.
2. air preheater as claimed in claim 1 is characterized in that: the surface high frequency of described gravity assisted heat pipe is welded with some to increase the flat fin of heat transfer area.
3. air preheater as claimed in claim 1 or 2, it is characterized in that: described gravity assisted heat pipe is round sealed formula gravity assisted heat pipe, is pumped into 1 ~ 2 * 10 in the sealed tube -4The negative pressure of Pa, and in pipe, fill with liquid heat transferring medium; The pipe fitting material of described gravity assisted heat pipe is carbon steel.
4. air preheater as claimed in claim 1 is characterized in that: be provided with a plurality of shoot doors in the described flue gas cavity.
5. such as claim 1 or 4 described air preheaters, it is characterized in that: the smoke inlet place of described flue gas cavity is provided with and guarantees rationally even gas baffle by heat exchange zone of flue gas.
CN2012203760436U 2012-08-01 2012-08-01 Air preheater Expired - Fee Related CN202733934U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012203760436U CN202733934U (en) 2012-08-01 2012-08-01 Air preheater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012203760436U CN202733934U (en) 2012-08-01 2012-08-01 Air preheater

Publications (1)

Publication Number Publication Date
CN202733934U true CN202733934U (en) 2013-02-13

Family

ID=47659629

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012203760436U Expired - Fee Related CN202733934U (en) 2012-08-01 2012-08-01 Air preheater

Country Status (1)

Country Link
CN (1) CN202733934U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103934270A (en) * 2014-05-08 2014-07-23 武汉钢铁(集团)公司 Roller off-line preheating system for continuous casting and rolling production line
CN106996576A (en) * 2017-05-19 2017-08-01 青岛诚信环保科技有限公司 A kind of novel energy-conserving heater
CN107420929A (en) * 2017-06-26 2017-12-01 安徽亿纵电子科技有限公司 A kind of air preheater exhaust gas temperature control system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103934270A (en) * 2014-05-08 2014-07-23 武汉钢铁(集团)公司 Roller off-line preheating system for continuous casting and rolling production line
CN106996576A (en) * 2017-05-19 2017-08-01 青岛诚信环保科技有限公司 A kind of novel energy-conserving heater
CN107420929A (en) * 2017-06-26 2017-12-01 安徽亿纵电子科技有限公司 A kind of air preheater exhaust gas temperature control system

Similar Documents

Publication Publication Date Title
CN101871042A (en) Method and device for reusing flue gas waste heat of annealing furnace of continuous annealing unit
CN103290191A (en) Device for recycling afterheat of thermal treatment furnace
CN202733934U (en) Air preheater
CN204404823U (en) A kind of energy-conserving and environment-protective aluminium alloy stock heater
CN104121591A (en) Energy-saving efficient incinerator
CN202254726U (en) Flue gas waste heat recoverer
CN205316352U (en) RTO system with tail gas waste heat recovery function
CN203489670U (en) Regenerative type continuous flame tube heating furnace
CN101915502A (en) Method for regulating oxygen atmosphere in fuel oil (gas) reverberatory furnace by using recovered fume
CN203462084U (en) Waste-heat utilization system of heat treatment production line
CN203550636U (en) Smoke waste heat utilizing device of ferroalloy electric furnace
CN104964572A (en) Product waste heat ring-shaped partition-type recovery system and method for pellet calcining rotary kiln
CN203980296U (en) A kind of staggered regenerative apparatus of energy-saving incinerator
CN203797952U (en) Intelligent gas water boiler with function of recovering condensation heat
CN207958425U (en) Electric heating roller-bottom type semiclosed loop thermal cycle annealing device
CN203837478U (en) Smelting furnace for producing aluminum or aluminum alloy
CN103486871B (en) Melting furnace chimney with waste heat recovery structure
CN206891155U (en) A kind of energy saving device for roller kilns
CN205640887U (en) Sediment waste heat utilization's air -cooled system at bottom of improvement circulating fluidized bed boiler
CN201909445U (en) Tubular heating furnace with plate type smoke condensation device
CN203980301U (en) A kind of efficient energy-saving incinerator
CN205223311U (en) Collection device to cast iron pipe annealing kiln gas
CN106196125B (en) A kind of exhaust-gas treatment structure applied to incinerator
CN201753361U (en) Recycling device for waste heat of flue gas of annealing furnace in continuous annealing unit
CN209669296U (en) A kind of cold rolled annealed furnace of energy-saving safety

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20170717

Address after: 430083, Gate No. 2, Qingshan District, Hubei, Wuhan

Patentee after: Wuhan iron and Steel Company Limited

Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang

Patentee before: Wuhan Iron & Steel (Group) Corp.

TR01 Transfer of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130213

Termination date: 20180801

CF01 Termination of patent right due to non-payment of annual fee