CN106091713A - The residual heat combined recirculation system of heating furnace - Google Patents
The residual heat combined recirculation system of heating furnace Download PDFInfo
- Publication number
- CN106091713A CN106091713A CN201610646376.9A CN201610646376A CN106091713A CN 106091713 A CN106091713 A CN 106091713A CN 201610646376 A CN201610646376 A CN 201610646376A CN 106091713 A CN106091713 A CN 106091713A
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- China
- Prior art keywords
- heating furnace
- outlet
- flue gas
- water
- water beam
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1892—Systems therefor not provided for in F22B1/1807 - F22B1/1861
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The open a kind of residual heat combined recirculation system of heating furnace of the present invention,, problem costly many mainly for the independent reclaimer of heating furnace waste heat, propose the residual heat combined recirculation system of heating furnace of a kind of combined recovery Vaporizing cooling mechanism and tail flue gas heat, including the Vaporizing cooling mechanism in the burner hearth being arranged on heating furnace, the flue gas heat exchange mechanism being arranged in heating furnace back-end ductwork and steam-water separator；Wherein, steam-water separator includes soda pop container and is arranged on the Natural Circulation entrance of soda pop lower vessel portion, Natural Circulation outlet, the outlet of forced circulation entrance, forced circulation, water inlet and is arranged on the saturated vapor outlet of soda pop upper vessel portion；Natural Circulation outlet connects with the water inlet of flue gas heat exchange mechanism, and Natural Circulation entrance connects with the outlet of flue gas heat exchange mechanism, and forced circulation outlet connects with the entrance of Vaporizing cooling mechanism, forced circulation entrance and the outlet of Vaporizing cooling mechanism.Present device quantity is few, it is low in energy consumption to run.
Description
Technical field
The present invention relates to a kind of residual heat combined recirculation system of heating furnace.
Background technology
At present, the heating furnace of domestic steel rolling mill, in order to improve the efficiency of heating furnace stove itself, reduces coal gas consumption, typically
Use the heat of independent Vaporizing cooling mode recovery furnace bottom water beam, it addition, heating furnace tail flue gas waste heat is generally used to heating
Air needed for own combustion, coal gas etc., its outlet cigarette temperature is about at about 300～400 DEG C, independent by using the most again
Back-end ductwork waste heat boiler reclaims this partial heat, and under this waste heat recovery mode, number of devices is numerous, and investment increases,
Operating cost is the highest.
Summary of the invention
For the problems referred to above, the present invention provides the heating of the heat of a kind of combined recovery Vaporizing cooling mechanism and tail flue gas
The residual heat combined recirculation system of stove.
For reaching above-mentioned purpose, the residual heat combined recirculation system of heating furnace of the present invention, including the stove being arranged on heating furnace
Vaporizing cooling mechanism in thorax, the flue gas heat exchange mechanism being arranged in heating furnace back-end ductwork and steam-water separator；
Wherein, described steam-water separator include soda pop container and the Natural Circulation entrance being arranged on soda pop lower vessel portion,
Natural Circulation outlet, the outlet of forced circulation entrance, forced circulation, water inlet and be arranged on the saturated vapor of soda pop upper vessel portion and go out
Mouthful；The outlet of described Natural Circulation connects with the water inlet of described flue gas heat exchange mechanism, described Natural Circulation entrance and described flue gas
The outlet connection of heat exchange mechanisms, the outlet of described forced circulation connects with the entrance of described Vaporizing cooling mechanism, and described pressure follows
Ring entrance and the outlet of described Vaporizing cooling mechanism.
Further, the outlet of described forced circulation is connected by forced circulation water inlet pipe with the entrance of described Vaporizing cooling mechanism
Logical, described forced circulation water inlet pipe is provided with forced circulation mechanism.
Further, the end of described heating furnace back-end ductwork connects with chimney, and the porch of described chimney is provided with draws
Blower fan.
Further, described Vaporizing cooling mechanism include cooling water beam, one end of described cooling water beam be provided with vaporization cold
But mechanism's entrance, the other end of described cooling water beam is provided with the outlet of Vaporizing cooling mechanism.
Further, described cooling water beam include water beam outer tube and in described water beam outer tube with described water beam outer coaxial tube
The core beam arranged；Described water beam outer tube one end seals, and the other end is tightly connected with the outer wall of described water beam core pipe；Described water beam core
Pipe one end is open in described water beam outer tube to be arranged, and the other end is arranged on described water beam outside pipe；Described water beam core pipe is arranged
Be provided with Vaporizing cooling mechanism entrance in one end of water beam outside pipe, described water beam outer tube enters near described Vaporizing cooling mechanism
One end of mouth is provided with the outlet of Vaporizing cooling mechanism.
Further, described Vaporizing cooling mechanism also include with cooling column, described cooling column include column tube and
At the internal column core pipe being coaxially disposed with described column tube of column tube；The lower end of described column tube seals, described vertical
The upper end of post outer tube connects with described cooling water beam；The lower end of described column core pipe is arranged at described column tube inner open,
The upper end of described column core pipe connects with described cooling water beam.
Further, described flue gas heat-exchange unit includes connection flue gas chamber in back-end ductwork, is arranged on described flue gas chamber
Outside water cavity and heat pipe, the two ends of described heat pipe are separately positioned in described flue gas chamber and described water cavity.
Further, the opposite sides of described flue gas intracavity is staggeredly equipped with deflector.
The residual heat combined recirculation system of heating furnace of the present invention is to the heat of the Vaporizing cooling mechanism in heating furnace and afterbody
The heat of flue gas carries out combined recovery, and the recovery of two kinds of thermals source shares a steam-water separation mechanism, uses forced circulation mode to return
Receive the waste heat recovery of furnace bottom water beam, use the mode of Natural Circulation to reclaim tail flue gas waste heat, decrease waste heat recovery apparatus
Quantity, has fully reclaimed residual heat resources, has also reduced the operation energy consumption of waste heat recovery apparatus simultaneously, saved cost.The present invention
First water heated, by the residual heat combined recirculation system of heating furnace by the tow taste heat in employing tail flue gas the most again
The high-grade heat using the Vaporizing cooling mechanism in heating furnace vaporizes water into and produces saturated vapor, so can obtain higher
The saturated vapor of grade, the utilization to waste heat is the most abundant.
Accompanying drawing explanation
Fig. 1 is the structural representation of the residual heat combined recirculation system of heating furnace of the present invention.
Detailed description of the invention
Below in conjunction with Figure of description, the present invention will be further described.
Embodiment 1
As it is shown in figure 1, the residual heat resources that the residual heat combined recirculation system of the present embodiment heating furnace reclaims include two parts:
The waste heat of high-temperature flue gas in the waste heat of heating furnace burner hearth inner cooling water beam and the back-end ductwork of heating furnace.Burner hearth at heating furnace 3
Inside it is provided with Vaporizing cooling mechanism 4, for the waste heat of absorption furnace bottom water beam.Flue gas heat exchange mechanism 5 is set in back-end ductwork, uses
Absorb the waste heat of flue gas.The end of back-end ductwork is connected with air-introduced machine 6, and air-introduced machine 6 is connected with chimney 7.
The residual heat combined recirculation system of the present embodiment heating furnace includes steam-water separation mechanism 1, Vaporizing cooling mechanism 4, cigarette
Gas heat exchange mechanisms 5 and circulation power mechanism 2.Steam-water separation mechanism 1 comprises six interfaces: water inlet, saturated vapor export, nature
The outlet of loop exit, Natural Circulation entrance, forced circulation and forced circulation entrance.
Vaporizing cooling mechanism 4 comprises two interfaces: water inlet tube interface and outlet pipe interface.
Flue gas heat exchange mechanism 5 comprises two interfaces: water inlet tube interface and outlet pipe interface.
Circulation power mechanism 2 comprises two interfaces: water inlet tube interface and outlet pipe interface.
The water inlet of steam-water separation mechanism 1 is connected with outside feedwater piping；Steam-water separation mechanism 1 saturated vapor outlet with
Outside jet chimney is connected；The Natural Circulation outlet of steam-water separation mechanism 1 and the water inlet tube interface phase of flue gas heat exchange mechanism 5
Even；The Natural Circulation entrance of steam-water separation mechanism 1 is connected with the outlet pipe interface of flue gas heat exchange mechanism 5；Steam-water separation mechanism 1
Forced circulation outlet is connected with the water inlet tube interface of circulation power mechanism 5；The outlet pipe interface of circulation power mechanism 2 is cold with vaporization
But the water inlet pipe of mechanism 4 is connected；The outlet pipe of Vaporizing cooling mechanism 4 is connected with the forced circulation entrance of steam-water separation mechanism 1.
Flue gas heat exchange mechanism 5 is arranged in the back-end ductwork after heating furnace, and the end of back-end ductwork connects air-introduced machine, air inducing
Machine is connected with chimney.
After outside feedwater enters steam-water separation mechanism 1, a part of water enters flue gas through the down-comer of Natural Circulation
In heat exchange mechanisms 5, absorb in back-end ductwork and become steam water interface after fume afterheat, enter vapour by the tedge of Natural Circulation
In water separator structure 1, the severe difference of down-comer and tedge medium is relied on to complete the soda pop flow process of a Natural Circulation；
Another part water in steam-water separation mechanism 1 is introduced in circulation power mechanism 2 through the down-comer of forced circulation, through following
The acting of gyration force mechanisms 2, in riser tubing after the pressure of water, enters in Vaporizing cooling mechanism 4, absorbs heating furnace 3 furnace bottom water
The waste heat of beam, enters in steam-water separation mechanism 1 by the tedge of forced circulation after being changed into steam water interface, relies on circulation
The pressure that actuating unit 2 provides completes the soda pop flow process of a forced circulation.
Therefore the present embodiment is the two kinds of residual heat resources (furnace bottom water beam waste heat and back-end ductwork waste heat) for heating furnace, use
One steam-water separation mechanism 1, by two kinds of endless form (Natural Circulation and forced circulation) combined recovery heating furnace residual heat resources
System.
The residual heat combined recirculation system of the present embodiment heating furnace is to the heat of the Vaporizing cooling mechanism in heating furnace and tail
The heat of portion's flue gas carries out combined recovery, and the recovery of two kinds of thermals source shares a steam-water separation mechanism, uses forced circulation mode
The waste heat recovery of recovery furnace bottom water beam, uses the mode of Natural Circulation to reclaim tail flue gas waste heat, decreases waste heat recovery apparatus
Quantity, fully reclaimed residual heat resources, also reduced the operation energy consumption of waste heat recovery apparatus simultaneously, saved cost.This reality
Execute the residual heat combined recirculation system of example heating furnace to using the tow taste heat in tail flue gas first water to be heated, so
After use the high-grade heat of the Vaporizing cooling mechanism in heating furnace vaporize water into and produce saturated vapor again, so can obtain
More high-grade saturated vapor, the utilization to waste heat is the most abundant.
Embodiment 2
On the basis of above-described embodiment, the described vaporization of the residual heat combined recirculation system of heating furnace of the present embodiment is cold
But mechanism includes that cooling water beam, one end of described cooling water beam are provided with Vaporizing cooling mechanism entrance, described cooling water beam another
Outer one end is provided with the outlet of Vaporizing cooling mechanism.
In the present embodiment, the water in steam-water separation mechanism 1 is squeezed in cooling water beam through circulation power mechanism Jiang Shui, a side
Face water is used for cooling down cooling water beam, still further aspect, and water absorbs the waste heat in cooling water beam, produces steam water interface and enters soda pop
In separating mechanism 1, both ensure that the safety that heating furnace runs, make use of again waste heat simultaneously.
Embodiment 3
On the basis of embodiment 2, described cooling water beam include water beam outer tube and in described water beam outer tube with described water
The core beam that beam outer coaxial tube is arranged；Described water beam outer tube one end seals, and the other end is tightly connected with the outer wall of described water beam core pipe；
Described water beam core pipe one end is open in described water beam outer tube to be arranged, and the other end is arranged on described water beam outside pipe；Described water
Liang Xin pipe is arranged on one end of water beam outside pipe and is provided with Vaporizing cooling mechanism entrance, and described water beam outer tube is near described vaporization
One end of cooling body entrance is provided with the outlet of Vaporizing cooling mechanism.
The present embodiment makes the cooling water of water beam enter from middle part to flow out from around, it is possible to uniform cooling water beam, meanwhile, and energy
Enough the heat of water beam is farthest taken away, it is possible to the farthest waste heat of recycle-water beam.
Embodiment 3
On the basis of above-described embodiment, described Vaporizing cooling mechanism also includes cooling down column, described cooling column Bao Li
Post outer tube and the column core pipe being coaxially disposed with described column tube in column tube inside；The lower end of described column tube is close
Envelope, the upper end of described column tube connects with described cooling water beam；The lower end of described column core pipe is inside described column tube
Open setting, the upper end of described column core pipe connects with described cooling water beam.
Vaporizing cooling mechanism in the present embodiment is water beam and the Vaporizing cooling mechanism of column one circulation, in such manner, it is possible to
Reduce the recycle unit of Vaporizing cooling mechanism, save space, simultaneously as steam-water separation mechanism have collected Shui Liang and stand simultaneously
The heat that post is absorbed, therefore, the saturated vapor in steam-water separation mechanism in the present embodiment either from quantity still from matter
For in amount, it is possible to greatly promote.
Embodiment 4
On the basis of above-described embodiment, described flue gas heat-exchange unit includes connection flue gas chamber in back-end ductwork, setting
At the water cavity outside described flue gas chamber and heat pipe, the two ends of described heat pipe are separately positioned in described flue gas chamber and described water cavity,
The opposite sides of described flue gas intracavity is staggeredly equipped with deflector.
The present embodiment uses heat pipe that flue gas chamber and water cavity are carried out heat exchange, owing to heat pipe for thermal conductivity is fast, therefore, it is possible to make water cavity
Exchange rapidly with the heat in flue gas chamber.Further, since flue gas intracavity opposite sides is staggeredly equipped with deflector, it is possible to extend cigarette
Gas is in flue gas intracavity residence time, therefore, it is possible to fully absorb the heat of flue gas.
Above, only presently preferred embodiments of the present invention, but protection scope of the present invention is not limited thereto, any it is familiar with basis
Those skilled in the art in the technical scope that the invention discloses, the change that can readily occur in or replacement, all should contain
Within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claim is defined.
Claims (8)
1. the residual heat combined recirculation system of heating furnace, it is characterised in that: include the vapour being arranged in the burner hearth of heating furnace
Change cooling body, the flue gas heat exchange mechanism being arranged in heating furnace back-end ductwork and steam-water separator；
Wherein, described steam-water separator includes soda pop container and is arranged on the Natural Circulation entrance of soda pop lower vessel portion, nature
Loop exit, forced circulation entrance, forced circulation outlet, water inlet and be arranged on soda pop upper vessel portion saturated vapor outlet；
The outlet of described Natural Circulation connects with the water inlet of described flue gas heat exchange mechanism, described Natural Circulation entrance and described flue gas heat exchange
The outlet connection of mechanism, the outlet of described forced circulation connects with the entrance of described Vaporizing cooling mechanism, and described forced circulation enters
Mouthful with the outlet of described Vaporizing cooling mechanism.
2. the as claimed in claim 1 residual heat combined recirculation system of heating furnace, it is characterised in that: the outlet of described forced circulation with
The entrance of described Vaporizing cooling mechanism is connected by forced circulation water inlet pipe, described forced circulation water inlet pipe is provided with pressure and follows
Ring mechanism.
3. the residual heat combined recirculation system of heating furnace as claimed in claim 1, it is characterised in that: described heating furnace back-end ductwork
End connect with chimney, the porch of described chimney is provided with air-introduced machine.
4. the residual heat combined recirculation system of heating furnace as claimed in claim 1, it is characterised in that: described Vaporizing cooling mechanism wraps
Including cooling water beam, one end of described cooling water beam is provided with Vaporizing cooling mechanism entrance, and the other end of described cooling water beam sets
It is equipped with the outlet of Vaporizing cooling mechanism.
5. the residual heat combined recirculation system of heating furnace as claimed in claim 4, it is characterised in that: described cooling water beam includes water
Beam outer tube and the core beam arranged with described water beam outer coaxial tube in described water beam outer tube；Described water beam outer tube one end seals, separately
One end is tightly connected with the outer wall of described water beam core pipe；Described water beam core pipe one end is open in described water beam outer tube to be arranged, separately
One end is arranged on described water beam outside pipe；One end that described water beam core pipe is arranged on water beam outside pipe is provided with Vaporizing cooling
Mechanism's entrance, described water beam outer tube is provided with the outlet of Vaporizing cooling mechanism near one end of described Vaporizing cooling mechanism entrance.
6. the residual heat combined recirculation system of heating furnace as claimed in claim 4, it is characterised in that: described Vaporizing cooling mechanism is also
Including with cooling column, described cooling column includes column tube and is coaxially disposed with described column tube column tube is internal
Column core pipe；The lower end of described column tube seals, and the upper end of described column tube connects with described cooling water beam；Described vertical
The lower end of post core pipe is arranged at described column tube inner open, and the upper end of described column core pipe connects with described cooling water beam.
7. the residual heat combined recirculation system of heating furnace as claimed in claim 1, it is characterised in that: described flue gas heat-exchange unit includes
Connecting the flue gas chamber in back-end ductwork, be arranged on the water cavity outside described flue gas chamber and heat pipe, the two ends of described heat pipe are respectively
It is arranged in described flue gas chamber and described water cavity.
8. the as claimed in claim 7 residual heat combined recirculation system of heating furnace, it is characterised in that: described flue gas intracavity relative
Both sides are staggeredly equipped with deflector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610646376.9A CN106091713A (en) | 2016-08-08 | 2016-08-08 | The residual heat combined recirculation system of heating furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610646376.9A CN106091713A (en) | 2016-08-08 | 2016-08-08 | The residual heat combined recirculation system of heating furnace |
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| Publication Number | Publication Date |
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| CN106091713A true CN106091713A (en) | 2016-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610646376.9A Pending CN106091713A (en) | 2016-08-08 | 2016-08-08 | The residual heat combined recirculation system of heating furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024120A (en) * | 2017-05-26 | 2017-08-08 | 中冶华天南京工程技术有限公司 | A kind of low-temperature flue gas of heating furnace and furnace bottom water beam waste heat comprehensive utilization system |
| CN107857321A (en) * | 2017-11-07 | 2018-03-30 | 西安协力动力科技有限公司 | A kind of technique for Waste Water From Fire Power Plant zero discharge treatment |
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| CN107024120A (en) * | 2017-05-26 | 2017-08-08 | 中冶华天南京工程技术有限公司 | A kind of low-temperature flue gas of heating furnace and furnace bottom water beam waste heat comprehensive utilization system |
| CN107857321A (en) * | 2017-11-07 | 2018-03-30 | 西安协力动力科技有限公司 | A kind of technique for Waste Water From Fire Power Plant zero discharge treatment |
| CN107857321B (en) * | 2017-11-07 | 2021-01-08 | 西安协力动力科技有限公司 | Process for zero discharge treatment of wastewater of thermal power plant |
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Application publication date: 20161109 |