CN108800956B - A kind of method and apparatus sintering machine tail waste heat multiple spot recycling and efficiently utilized - Google Patents
A kind of method and apparatus sintering machine tail waste heat multiple spot recycling and efficiently utilized Download PDFInfo
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- CN108800956B CN108800956B CN201810366341.9A CN201810366341A CN108800956B CN 108800956 B CN108800956 B CN 108800956B CN 201810366341 A CN201810366341 A CN 201810366341A CN 108800956 B CN108800956 B CN 108800956B
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- 238000005245 sintering Methods 0.000 title claims abstract description 142
- 238000000034 method Methods 0.000 title claims abstract description 69
- 239000002918 waste heat Substances 0.000 title claims abstract description 40
- 238000004064 recycling Methods 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 204
- 230000005855 radiation Effects 0.000 claims abstract description 89
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000003546 flue gas Substances 0.000 claims abstract description 72
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 93
- 239000003517 fume Substances 0.000 claims description 53
- 230000001105 regulatory effect Effects 0.000 claims description 43
- 229920006395 saturated elastomer Polymers 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims description 14
- 238000011144 upstream manufacturing Methods 0.000 claims description 13
- 239000012774 insulation material Substances 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 7
- 238000010025 steaming Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000011217 control strategy Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 206010020843 Hyperthermia Diseases 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F27D17/004—
-
- 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
-
- F27D2017/006—
-
- 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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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
A kind of method sintering machine tail waste heat multiple spot recycling and efficiently utilized lights a fire method includes the following steps: 1) sinter mixture is packed on sintering pallet 1, starts to be sintered；2) top of sintering machine tail portion loop 2 is equipped with radiation recuperator 3, and the empty station vehicle 1 that water supply enters on radiation recuperator 3 and loop 2 carries out heat exchange, and water supply heating becomes water at low temperature；3) corresponding 5 position of flue of several bellows 4 of sintering machine tail portion is equipped with convection recuperator 6, and water at low temperature enters convection recuperator 6, carries out heat exchange with the high-temperature flue gas in flue 5, water at low temperature generates steam after high-temperature flue gas heats；4) steam is for users to use.The comprehensive multiple spot recycling sintering machine tail portion high-temperature flue gas waste heat of the present invention and loop sensible heat, improve heat recovery rate, improve loop operating environment nearby.
Description
Technical field
The present invention relates to sintering machine tail residual heat using devices, and in particular to a kind of sintering machine tail waste heat multiple spot recycling and efficiently
The method and apparatus utilized belong to steel industry sinter production field.
Background technique
Residual heat resources entrained by the large and medium-sized iron and steel enterprise 1t sinter in China are about 0.94~1.02GJ, account for about burning respectively
Tie the 65%~71% and 11%~12% of process and iron and steel enterprise's residual heat resources total amount.With the large and medium-sized steel of developed country
Enterprise compares, and the rate of recovery of Iron and Steel Enterprises in China sinter residual heat resources is lower than the average water of external main large and medium-sized iron and steel enterprise
Flat 30%~45%, only 28%~30%.Therefore, the high efficiente callback of sinter residual heat resources and utilization become reduction sintering
Significant problem urgently to be solved in process energy consumption and rationalization production technology.
Waste heat resources in sintering process mainly consists of two parts: a part from sintering machine ore removal waste heat, be temperature about
For sensible heat, that is, sintering mine sensible heat entrained by 800~950 DEG C of sinters, this part sensible heat accounts for about waste heat resources in sintering process total amount
70%；Another part is from sintering machine tail portion waste heat, sintering flue gas sensible heat and backhaul platform including sintering machine smoke discharging pipe
Vehicle (i.e. loop) sensible heat, this part of waste heat account for about the 30% of residual heat resources total amount.
Comparatively, sintering machine ore removal waste heat calorie value is larger in two kinds of residual heat resources, quality is higher, being directed at present should
The technology that partial heat is recycled is highly developed, and major technique has blowing-type ring cold machine, straight line cooler and in recent years
Carry out the vertical cooler that new development is got up；And it is sintered tail portion waste heat (containing obvious heat of smoke and loop sensible heat) calorie value is relatively
Small, quality is lower, and (sintering smoke from big gas duct mean temperature is 100~150 DEG C, and comparison of ingredients is complicated, especially contains SO2、
The objectionable impurities such as NOx, dioxin and dust), at present for the generally existing waste heat recycling of the recovery technology of sintering machine tail portion waste heat
Not exclusively, nearby severe operational environment, waste heat recycling adjust the problems such as not flexible, quality of steaming is unstable to loop.
When sintering machine operates normally, sinter mixture is covered on advance trolley, mixture carries out charge level point through ignition furnace
After fire, under the suction pressure of bellows, the combustion zone of mixture moves from top to bottom, until being moved to pallet bottom completes sintering
Process.Overturning discharging is carried out when advance trolley is run to sintering machine tail portion gear wheel position, becomes loop.Bellows are sintering
Process provides negative pressure, is collected simultaneously sintering flue gas and enters sintering machine flue, is discharged using after electric precipitation by chimney.
At sintering machine head and middle part, combustion zone is located at trolley at the middle and upper levels, and the high-temperature flue gas for generation of burning will be to bottom
Mixture preheated, therefore the flue-gas temperature at sintering machine head and middle part is not high, at 75 DEG C~150 DEG C or so.Work as sintering
When machine trolley operation is close to tail portion, the mixture sintering process in trolley is nearly completed, the cigarette that combustion zone generates in sintering process
Gas does not need preheating lower layer's mixture, therefore the sintering flue gas temperature of the several bellows in sintering machine tail portion is higher, 300 DEG C reachable~
400℃.This part high-temperature flue gas of major part sintering machine is directly entered large flue at present, the middle low temperature with sintering machine other bellows
It carries out electric precipitation after flue gas mixing to be discharged by chimney, heat entrained by the high-temperature flue gas of so several bellows in sintering machine tail portion does not have
It is recycled, causes the waste of the energy, result in the high of sintering process energy consumption.
In addition, advance trolley still has higher after gear wheel overturning discharging in sintering machine tail portion becomes loop
Temperature, about 100 DEG C~200 DEG C.The heat of this part high temperature empty station vehicle is not due to being used, so that near loop
Environment temperature seriously increase, worker operation environmental degradation and there are biggish scald hidden danger.
Therefore, how comprehensive reutilization sintering machine tail obvious heat of smoke and loop sensible heat become entire sintering machine waste heat
The difficult point and emphasis of recycling.
It is more for the report of sintering flue gas residual heat recycling both at home and abroad at present, but carried out for loop sensible heat single
Solely recycling or for sintering flue gas sensible heat and loop sensible heat carry out the report of combined recovery almost without.It has been reported substantially
All it is directly to be exchanged heat or indirect heat exchange in sintering machine back-end ductwork setting heat exchanger, recycles back-end ductwork high-temperature flue gas
Waste heat carries out power generation of steaming, and there are the following problems:
(1) waste heat recycling is incomplete；
(2) severe operational environment near loop；
(3) regulating measure is not flexible, and quality of steaming is unstable, is unable to satisfy that user is a variety of to use heat demand.
Summary of the invention
Aiming at the shortcomings in the prior art, the purpose of the present invention is to provide a kind of recycling of sintering machine tail waste heat multiple spot and height
Imitate the method and apparatus utilized.This method and the comprehensive multiple spot recycling sintering machine back-end ductwork high-temperature residual heat of device and loop are aobvious
The rate of recovery of heat, residual heat resources greatly improves, and improves the operating environment near loop；Meanwhile when residual heat resources occur
When fluctuation or user demand change, the present invention uses various control strategy, by introducing external superheated steam, ensure that the product of steaming
The stability of matter can meet a variety of of user and use heat demand.
The first embodiment according to the present invention provides a kind of side sintering machine tail waste heat multiple spot recycling and efficiently utilized
Method:
A kind of method sintering machine tail waste heat multiple spot recycling and efficiently utilized, method includes the following steps:
1) sinter mixture is packed on sintering pallet and is lighted a fire, start to be sintered；
2) top of sintering machine tail portion loop is equipped with radiation recuperator, and water supply enters on radiation recuperator and loop
Empty station vehicle carries out heat exchange, and water supply heating becomes water at low temperature；
3) the corresponding flue position of several bellows of sintering machine tail portion (or rear end) is equipped with convection recuperator, and water at low temperature enters
High-temperature flue gas in convection recuperator, with flue carries out heat exchange, and water at low temperature generates steam after high-temperature flue gas heats；
4) steam is for users to use.
Preferably, in step 3), the convection recuperator be the wear-resisting convection recuperator of multi-stage multi-pipe, preferably 2-5 grades
The wear-resisting convection recuperator of multitube, the more preferably 3-4 grades of wear-resisting convection recuperator of multitube.
Preferably, whether convection recuperator is greater than according to the maximum quantity of steam that the fume afterheat in flue can generate
The MCR steam flow that pipeline allows, judges between the wear-resisting convection recuperator of multitubes at different levels to be series operation or parallel running.
Preferably, the pipeline that the maximum quantity of steam that the fume afterheat in flue can generate is less than convection recuperator is permitted
When MCR steam flow perhaps, series operation between the wear-resisting convection recuperators of multitube at different levels.
Allow when the pipeline that the maximum quantity of steam that the fume afterheat in flue can generate is more than or equal to convection recuperator
When MCR steam flow, parallel running between the wear-resisting convection recuperators of multitube at different levels.
In the present invention, whether the maximum quantity of steam that the fume afterheat according in flue can generate changes greater than convection current
The MCR steam flow that the pipeline of hot device allows, judges it is series operation or simultaneously through transport between the wear-resisting convection recuperator of multitubes at different levels
Row, specific judgment method are as follows:
A) calculate the maximum quantity of steam that the fume afterheat in flue can generate: setting the fume afterheat in flue can generate
Maximum quantity of steam be Qs, the steam enthalpy for meeting user's needs is h0, detecting the water at low temperature heat content before entering convection recuperator is
hs, the sum of the flue gas flow for detecting several bellows after convection recuperator is Qy, cigarette before detection convection recuperator exchanges heat with high-temperature flue gas
The flue-gas temperature in road is Ty1, detection convection recuperator and the flue-gas temperature of high-temperature flue gas heat exchange rear pass are Ty2, by flue
The heat that the heat and convection recuperator that high-temperature flue gas is released are absorbed is equal, obtains:
Qs×(h0-hs)=Qy×(Ty1-Ty2) (1),
It can be obtained by formula (1), the maximum quantity of steam that the fume afterheat in flue can generate are as follows:
B) it calculates the MCR steam flow that the pipeline of convection recuperator allows: setting the maximum that the pipeline of convection recuperator allows
Steam flow is Qg, the pipe diameter for measuring convection recuperator is D, and economic velocity of the steam in the pipeline of convection recuperator is
V is obtained:
Qg=D2×0.785×V (3)；
C) judge that the pipeline for the maximum quantity of steam and convection recuperator that the fume afterheat in flue can generate allows most
Size between big steam flow.
In above-mentioned judgment method, the steam enthalpy for meeting user's needs is h0, value is set by the user.And right
The flue position for flowing heat exchanger upstream is equipped with the 4th test point, for detecting flue before convection recuperator exchanges heat with high-temperature flue gas
Flue-gas temperature Ty1.It is equipped with the 5th test point in the flue position in convection recuperator downstream, for detecting convection recuperator and high temperature
The flue-gas temperature T of flue gas heat exchange rear passy2.It is equipped with the 6th test point in first pipe, enters convection recuperator for detecting
Preceding water at low temperature heat content hs.The sum of flue gas flow of several bellows Q after the convection recuperatory, several bellows first herein are
Refer to, from the bellows being equipped with from convection recuperator position to all bellows of sintering machine tail portion the last one bellows, because of flue
The trolley traffic direction of flue gas trend and arrow meaning in Fig. 2 on the contrary, so from equipped with the bellows from convection recuperator position to
The high-temperature flue gas of all bellows of the last one bellows of sintering machine tail portion can exchange heat with convection recuperator, it is therefore desirable to examine
Survey the sum of the flue gas flow of these bellows Qy；Generally to the flue gas of each bellows in the sintering machine control system of the prior art
Flow is equipped with test point, thus, it is possible to the sum of flue gas flow of several bellows Q after measuring convection recuperatory.In addition, steam
Economic velocity V in different pipeline classifications is not also identical, and value range is as shown in table 1.
Economic velocity V of 1 steam of table in different pipelines
In the present invention, series operation between the wear-resisting convection recuperator of multitube at different levels, specifically:
The water at low temperature come out from radiation recuperator is introduced into the wear-resisting convection recuperator of level-one multitube, and fume afterheat is by water at low temperature
It is heated into saturated water or unsaturated water, saturated water or unsaturated water enter drum, and the unsaturated water in drum enters second level multitube
Unsaturated water is heated into saturated water by wear-resisting convection recuperator, fume afterheat, and saturated water is back to drum, the saturation that drum generates
Steam enters the wear-resisting convection recuperator of three-level multitube, and saturated vapor is thermally formed superheated steam through high-temperature flue gas.
In the present invention, parallel running between the wear-resisting convection recuperator of multitube at different levels, specifically:
The water at low temperature parallel connection come out from radiation recuperator enters the wear-resisting convection recuperator of multitubes at different levels, and multitubes at different levels are wear-resisting right
Water at low temperature in stream heat exchanger generates steam after high-temperature flue gas heats.
In the present invention, convection recuperator is the wear-resisting convection recuperator of multi-stage multi-pipe, for example, 2-5 grades of wear-resisting convection current of multitube
The wear-resisting convection recuperator of heat exchanger, preferably 3-4 grade multitube.It is changed for example, convection recuperator can be the wear-resisting convection current of three-level multitube
Hot device can be the wear-resisting convection recuperator of two-stage multitube, be also possible to the wear-resisting convection recuperator of level Four multitube.
Preferably, in step 4), steam is sent out for users to use through steam main pipe.
Preferably, external steam pipeline is also connected in steam main pipe.External steam is introduced via external steam pipeline,
After being mixed with the steam in steam main pipe for users to use.Preferably, the introducing of external steam pipeline is superheated steam.
Preferably, in step 4), in steam main pipe, external steam pipeline be incorporated into the upstream setting the of steam main pipe
One test point.Second test point is set on external jet chimney.It is set in the downstream that external jet chimney is incorporated into steam main pipe
Set third test point.The steam flow Q of first test point on-line checking corresponding position1With steam enthalpy h1.Second test point exists
The steam flow Q of line detection corresponding position2With steam enthalpy h2.The steam stream of third test point on-line checking corresponding position
Measure Q3With steam enthalpy h3。
In the present invention, the setting of the first test point is for detecting the steam flow and steam heat in convection recuperator exit
Enthalpy.The setting of second test point is for detecting the steam flow and steam enthalpy of external steam.The setting of third test point is used for
Detect the mixed steam flow of both convection recuperator outlet vapor and external steam and steam enthalpy.
Preferably, when the fume afterheat resource in flue is constant or increases, the steam flow in convection recuperator exit
Q1With steam enthalpy h1, can satisfy steam flow Q required for user0With steam enthalpy h0。
When the fume afterheat resource in flue is reduced, the first test point detects steam enthalpy by h1It is reduced to h'1When, for
The steam that family uses is regulated and controled by three kinds of control models.
In the present invention, the first control model of steam for users to use is the control model of " guaranteeing both quality and quantity ", specifically
Are as follows: the steam flow Q required for user provides0With steam enthalpy h0When, the first test point detects convection recuperator exit and steams
Steam flow amount is Q1, steam enthalpy h'1, it is h that the second test point, which detects external steam heat content,2, set at the second test point position
Steam flow is Q2 set, the steam flow at third test point position is set as Q3 set；
Both it is equal to by the sum of the included heat of convection recuperator exit steam and the included heat of external steam and is mixed
Steam total amount of heat afterwards can obtain:
Q1×h′1+Q2 set×h2=Q3 set×h0(4),
It is equal to quality of steam after the two mixes with external steam quality sum by convection recuperator exit quality of steam, it can
:
Q3 set=Q1+Q2 set(5),
By formula (4) and (5) to get:
External steam flow Q at this time2 setIt only can guarantee that mixed steam enthalpy is h0, but cannot be guaranteed mixed steam
Flow Q3 setIt can satisfy the steam flow Q of user's requirement0；Compare the steam flow Q of user's requirement0With it is obtained in formula (5)
Mixed steam flow Q3 setSize, further to external steam flow Q2 setCarry out value:
Work as Q0< Q3 setWhen,
Work as Q0> Q3 setWhen, Q2 set=Q0-Q1(8)；
The aperture for adjusting the external steam flow control valve on external steam pipeline, so that external steam pipeline is introduced
Steam flow is Q2 set。
In the present invention, second of the control model of steam for users to use is the control model of " decrement of guaranteeing the quality ", specifically
Are as follows: the steam enthalpy h required for user only provides0When, the external steam flow control valve on external steam pipeline is closed, the
It is Q that one test point, which detects convection recuperator exit steam flow,1, steam enthalpy h'1, setting feedwater flow should be adjusted to
Q1 sets, had according to law of conservation of energy:
Q1×h′1=Q1 sets×h0(9),
By formula (9), can obtain:
The aperture for adjusting the water main flow control valve of radiation recuperator inlet, so that giving into radiation recuperator
Water flow is Q1 sets。
In the present invention, the third control model of steam for users to use is the control model of " guarantor that degrades amount ", specifically
Are as follows: when user only provides steam flow Q required for satisfaction0When, the external steam flow closed on external steam pipeline is adjusted
Valve guarantees feedwater flow Q1It is constant.
Preferably, in step 2), the radiation recuperator is wave-fin pipe radiation recuperator；The radiation of wave-fin pipe
Heat exchanger includes coiled pipe and the helical fin for being enclosed in coiled pipe periphery.
Preferably, in step 3), several bellows of the sintering machine tail portion are inverse the 1-10th of sintering machine tail portion
Bellows, preferably inverse 2-8 bellows, more preferably inverse 3-6 bellows.
Preferably, anti-crosswind baffle is additionally provided with around radiation recuperator.
Preferably, thermal insulating material is laid with outside the corresponding wind box branch pipe of sintering machine tail portion bellows and (tail portion) flue
Material.
Preferably, being additionally provided with control system.Control system connects and controls external steam flow control valve, water main
The operation of flow control valve.
Second of embodiment according to the present invention, provides a kind of sintering machine tail waste heat multiple spot recycling and efficient utilize fills
It sets:
A kind of recycling of sintering machine tail waste heat multiple spot and efficient utilization device or the device for the above method, the device include
Sintering machine, sintering machine tail portion lower section are equipped with loop.Multiple bellows are equipped with below the trolley of sintering machine.Each bellows pass through respective
Wind box branch pipe is connected to the flue of lower part.The device further includes radiation recuperator and convection recuperator.Wherein radiation recuperator is set
It sets in the top of loop.Convection recuperator is arranged on the corresponding flue of several bellows of sintering machine tail portion.Radiation recuperator
Water out be connected to the entrance of convection recuperator.
Preferably, the convection recuperator is the wear-resisting convection recuperator of multi-stage multi-pipe, and preferably 2-5 grades of multitube is wear-resisting right
Flow heat exchanger, the more preferably 3-4 grades of wear-resisting convection recuperator of multitube.
Preferably, which further includes drum.Wherein, the water out of radiation recuperator is connected to three via first pipe
The first entrance of the grade wear-resisting convection recuperator of multitube.Second pipe is separated from first pipe is connected to the wear-resisting convection current of level-one multitube
The entrance of heat exchanger.The first entrance that third pipeline is connected to the wear-resisting convection recuperator of second level multitube is separated from first pipe.
The outlet of the wear-resisting convection recuperator of level-one multitube is connected to steam main pipe via the 4th pipeline.The 5th pipe is separated from the 4th pipeline
Road is connected to the first entrance of drum.The first outlet of drum is connected to the wear-resisting heat convection of second level multitube via drum down-comer
The second entrance of device.The outlet of the wear-resisting convection recuperator of second level multitube is connected to the second entrance of drum via drum tedge.
The 6th pipeline is separated from drum tedge is connected to steam main pipe.The second outlet of drum is connected to three-level via the 7th pipeline
The second entrance of the wear-resisting convection recuperator of multitube.The outlet of the wear-resisting convection recuperator of three-level multitube is connected to steaming via the 8th pipeline
Vapour main pipe.
Preferably, second pipe is equipped with the wear-resisting convection recuperator flow of inlet water regulating valve of level-one multitube.Third pipeline
It is equipped with the wear-resisting convection recuperator flow of inlet water regulating valve of second level multitube.First pipe is equipped with the wear-resisting convection recuperator of three-level multitube
Flow of inlet water regulating valve.The wear-resisting convection recuperator outlet of level-one multitube is equipped in the downstream that the 4th pipeline separates the 5th pipeline location
Steam flow control valve.5th pipeline is equipped with the wear-resisting convection recuperator of level-one multitube to drum Water flow adjusting valve.Under drum
It drops pipe and is equipped with drum to the wear-resisting convection recuperator Water flow adjusting valve of second level multitube.The 6th pipeline position is separated in drum tedge
The downstream set is equipped with the wear-resisting convection recuperator of second level multitube to drum Water flow adjusting valve.It is resistance to that 6th pipeline is equipped with second level multitube
Grind convection recuperator outlet vapor flow control valve.7th pipeline is equipped with drum to the wear-resisting convection recuperator steam of three-level multitube
Flow control valve.8th pipeline is equipped with the wear-resisting convection recuperator outlet vapor flow control valve of three-level multitube.
In the present invention, the 4th test point is set in the flue position of convection recuperator upstream.In convection recuperator downstream
Flue position be arranged the 5th test point.6th test point is set in first pipe.
Preferably, which further includes water main, and water main is connected to the entrance of radiation recuperator.
Preferably, water main flow control valve is equipped on water main.
Preferably, external steam pipeline is also connected in steam main pipe.
Preferably, external steam pipeline is equipped with external steam flow control valve.
In the present invention, in steam main pipe, external steam pipeline be incorporated into steam main pipe upstream setting first detection
Point.Second test point is set on external jet chimney.In the downstream that external jet chimney is incorporated into steam main pipe, third is set
Test point.
Preferably, the radiation recuperator is wave-fin pipe radiation recuperator.Wave-fin pipe radiation recuperator packet
Include coiled pipe and the helical fin for being enclosed in coiled pipe periphery.
Preferably, several bellows of the sintering machine tail portion are the inverse 1-10 bellows of sintering machine tail portion, preferably
For inverse 2-8 bellows, more preferably inverse 3-6 bellows.
Preferably, being additionally provided with anti-crosswind baffle around radiation recuperator.
Preferably, being laid with thermal insulating material outside the corresponding wind box branch pipe of sintering machine tail portion bellows and (tail portion) flue
Material.
Preferably, which further includes control system.Control system connect and control external steam flow control valve, to
The wear-resisting convection recuperator flow of inlet water regulating valve of supply mains's flow control valve, level-one multitube, the wear-resisting convection recuperator of second level multitube
The wear-resisting convection recuperator flow of inlet water regulating valve of flow of inlet water regulating valve, three-level multitube, the wear-resisting convection recuperator of level-one multitube go out
Mouth steam flow control valve, the wear-resisting convection recuperator of level-one multitube to drum Water flow adjusting valve, drum are wear-resisting to second level multitube
Convection recuperator Water flow adjusting valve, the wear-resisting convection recuperator of second level multitube to drum Water flow adjusting valve, second level multitube are wear-resisting
Convection recuperator outlet vapor flow control valve, drum to the wear-resisting convection recuperator steam flow control valve of three-level multitube, three-level
The operation of the wear-resisting convection recuperator outlet vapor flow control valve of multitube.
The third embodiment according to the present invention provides a kind of recycling of sintering machine tail waste heat multiple spot and efficient utilization device
Control method:
The control method of a kind of recycling of sintering machine tail waste heat multiple spot and efficient utilization device or method using above-mentioned apparatus,
Method includes the following steps:
1) device brings into operation；
2) steam parameter needed for setting user: steam flow Q0And/or steam enthalpy h0；
3) the steam flow Q that control system real-time monitoring third test point measures3With steam enthalpy h3；
4) control system judgment step 3) in detected steam parameter whether meet wanting for steam parameter needed for user
It asks；If meeting the requirements, return step 3)；If being unsatisfactory for requiring, step 5) is carried out；
5) whether the maximum quantity of steam that control system judges that the fume afterheat in flue can generate is greater than convection recuperator
Pipeline allow MCR steam flow；If so, carrying out step 6)；If it is not, then carrying out step 7)；
6) pipeline that the maximum quantity of steam that the fume afterheat in flue can generate is more than or equal to convection recuperator allows
Corresponding valve is opened and closed in MCR steam flow, parallel running between the wear-resisting convection recuperators of multitube at different levels, control system
Control；Then step 8) is carried out；
7) the maximum quantity of steam that the fume afterheat in flue can generate is less than the maximum that the pipeline of convection recuperator allows
Control is opened and closed to corresponding valve in steam flow, series operation between the wear-resisting convection recuperators of multitube at different levels, control system；
Then step 8) is carried out；
8) control system steam parameter value according to needed for user set in step 2) selects corresponding control model:
1. when concurrently setting steam flow Q in step 2)0With steam enthalpy h0When, control system selects " guaranteeing both quality and quantity "
Control model: control system detects the steam parameter of the first test point and the second test point, introduces needed for calculating
External steam flow Q2 set, control system passes through the aperture for adjusting external steam flow control valve, so that introduced external steam
Flow is Q2 set；
2. when only setting steam enthalpy h in step 2)0When, control system selects the control model of " decrement of guaranteeing the quality ": control
System detects the steam parameter of the first test point, calculates feedwater flow Q adjusted1 sets, control system control closing
External steam flow control valve adjusts the aperture of water main flow control valve, so that into the feedwater flow of radiation recuperator
For Q1 sets；
3. when only setting steam flow Q in step 2)0When, control system selects the control model of " guarantor that degrades amount ": control
External steam flow control valve is closed in system control, guarantees feedwater flow Q1It is constant；
9) control system judges whether the steam parameter of third test point meets steam parameter requirement needed for user；If meeting
It is required that then return step 3)；If being unsatisfactory for requiring, return step 8).
In the step 6) of the above method, parallel running between the wear-resisting convection recuperators of multitube at different levels, control system pair
Control is opened and closed in corresponding valve, specifically: control system controls the wear-resisting convection recuperator flow of inlet water of level-one multitube and adjusts
The wear-resisting convection recuperator outlet vapor flow control valve of valve, level-one multitube is opened, the wear-resisting convection recuperator of level-one multitube to drum
Water flow adjusting valve is closed；The wear-resisting convection recuperator flow of inlet water regulating valve of second level multitube, the wear-resisting convection recuperator of second level multitube
Outlet vapor flow control valve is opened, and drum is wear-resisting to the wear-resisting convection recuperator Water flow adjusting valve of second level multitube, second level multitube
Convection recuperator to drum Water flow adjusting valve is closed；The wear-resisting convection recuperator flow of inlet water regulating valve of three-level multitube, three-level are more
It manages wear-resisting convection recuperator outlet vapor flow control valve to open, drum to the wear-resisting convection recuperator steam flow tune of three-level multitube
Valve is saved to close.
Between the wear-resisting convection recuperators of multitube at different levels when parallel running, the flow of inlet water of the wear-resisting convection recuperators of multitube at different levels
It is controlled respectively by respective flow of inlet water regulating valve, the steam generated after in parallel is sent out for users to use through steam main pipe.
In the step 7) of the above method, series operation between the wear-resisting convection recuperators of multitube at different levels, control system pair
Control is opened and closed in corresponding valve, specifically: control system controls the wear-resisting convection recuperator flow of inlet water of level-one multitube and adjusts
Valve, the wear-resisting convection recuperator of level-one multitube to drum Water flow adjusting valve are opened, and the wear-resisting convection recuperator outlet of level-one multitube is steamed
Steam flow adjustable valve is closed, and drum to the wear-resisting convection recuperator Water flow adjusting valve of second level multitube, the wear-resisting convection current of second level multitube changes
Hot device to drum Water flow adjusting valve is opened, and the wear-resisting convection recuperator flow of inlet water regulating valve of second level multitube, second level multitube are wear-resisting
Convection recuperator outlet vapor flow control valve is closed, drum to the wear-resisting convection recuperator steam flow control valve of three-level multitube,
The wear-resisting convection recuperator outlet vapor flow control valve of three-level multitube is opened, the wear-resisting convection recuperator flow of inlet water tune of three-level multitube
Valve is saved to close.
When the decline of sintering machine yield causes to be sintered the reduction of flue gas residual heat resource, residual neat recovering system can be caused to export
The parameter fluctuations such as the pressure and temperature of steam cause steam parameter to be unable to satisfy user's heat demand；Meanwhile user is in order to meet
The production requirement of different occasions also may require that steam parameter being capable of flexible modulation control.In above-mentioned control method, when waste heat provides
When source is fluctuated, the stability for quality of steaming ensure that by the external superheated steam of introducing using various control strategy, it can
Meet a variety of of user and uses heat demand.In addition, in the case where residual heat resources are not reduced, if the demand of user itself changes
Become, above-mentioned apparatus, method and control strategy are equally applicable.
In the present invention, wave-fin pipe radiation recuperator is set in the top of sintering machine tail portion loop, recycles carriage return
Road sensible heat improves heat recovery rate, while reducing loop environment temperature nearby, improves loop operating environment nearby.
Wave-fin pipe radiation recuperator includes that coiled pipe is mentioned with the helical fin for being enclosed in coiled pipe periphery with increasing heat exchange area
High heat transfer effect.In addition, the present invention is equipped with anti-crosswind baffle also around wave-fin pipe radiation recuperator, to reduce crosswind
Influence to wave-fin pipe radiation recuperator heat transfer effect further improves its neighbouring operating environment.Water supply enters snakelike wing
Feed temperature can be improved 5-10 DEG C by piece pipe radiation recuperator, generally, the hyperthermia radiation heat of loop.
The corresponding flue position of several bellows in sintering machine tail portion or rear end is equipped with the wear-resisting convection recuperator of multi-stage multi-pipe,
For recycling the high-temperature flue gas waste heat of the several bellows in sintering machine tail portion, utilization rate of waste heat is further increased.Generally, in sintering machine
Head and middle part, combustion zone are located at trolley at the middle and upper levels, and the high-temperature flue gas for generation of burning will preheat the mixture of bottom,
Therefore the flue-gas temperature at sintering machine head and middle part is not high；Mixture when sintering pallet operation is close to tail portion, in trolley
Sintering process is nearly completed, and the flue gas that combustion zone generates in sintering process does not need preheating lower layer's mixture, therefore sintering machine tail
The sintering flue gas temperature of the several bellows in portion is higher.The wear-resisting convection recuperator of multi-stage multi-pipe is arranged in sintering machine the present invention as a result,
The corresponding flue position of the several bellows in tail portion, such as be arranged at the inverse 1-10 bellows of sintering machine tail portion, it is preferably provided with
At the inverse 2-8 bellows of sintering machine tail portion, it is more preferably disposed at the inverse 3-6 bellows of sintering machine tail portion, has
Waste heat recycling and utilization pointedly are carried out to sintering high temperature flue gas.In addition, the present invention is in sintering machine tail portion (multiple) bellows
Thermal insulation material is also laid in wind box branch pipe and back-end ductwork tail portion, to reduce the radiation loss of bellows and flue, further increases remaining
Efficiency of heating- utilization.
Compared with prior art, the invention has the following advantages:
1, the method for the present invention and the comprehensive multiple spot recycling sintering machine back-end ductwork high-temperature residual heat of device and loop sensible heat, are improved
The recovery utilization rate of residual heat resources, improves the operating environment near loop；
2, the method for the present invention introduces external superheated steam by external steam pipeline, is adjusted by control water main flow
The aperture of valve and external steam flow control valve adjusts waste heat and returns to control water supply total flow and external steam flowrate proportioning
System outlet steam parameter is received, guarantees the stability of quality of steaming, meets the difference heat demand of user；
3, the present invention provides a kind of flexible and changeable, control principle and method analysis for being precisely controlled, incogruent thermal technology is met
Condition condition and a variety of of user use heat demand.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of sintering machine system tail portion；
Fig. 2 is the structural schematic diagram of a kind of sintering machine tail waste heat multiple spot recycling of the present invention and efficient utilization device；
Fig. 3 is the partial enlarged view of the position N in Fig. 2；
Fig. 4 is the top view of the radiation recuperator of apparatus of the present invention；
Fig. 5 is the cross-sectional view of the position B-B in Fig. 4；
Fig. 6 is control system schematic diagram of the invention；
Fig. 7 is the flow chart of a kind of sintering machine tail waste heat multiple spot recycling of the present invention and Efficient utilization method.
Appended drawing reference:
A: sintering machine；1: trolley；2: loop；3: radiation recuperator；301: coiled pipe；302: helical fin；303: spoke
Penetrate the entrance of heat exchanger；304: the water out of radiation recuperator；4: bellows；401: wind box branch pipe；5: flue；6: heat convection
Device；6a: the wear-resisting convection recuperator of level-one multitube；6a01: the entrance of the wear-resisting convection recuperator of level-one multitube；6a02: level-one multitube
The outlet of wear-resisting convection recuperator；6b: the wear-resisting convection recuperator of second level multitube；6b01: the wear-resisting convection recuperator of second level multitube
First entrance；6b02: the outlet of the wear-resisting convection recuperator of second level multitube；6b03: the second of the wear-resisting convection recuperator of second level multitube
Entrance；6c: the wear-resisting convection recuperator of three-level multitube；6c01: the first entrance of the wear-resisting convection recuperator of three-level multitube；6c02: three
The outlet of the grade wear-resisting convection recuperator of multitube；6c03: the second entrance of the wear-resisting convection recuperator of three-level multitube；7: drum；701:
The first entrance of drum；702: the first outlet of drum；703: the second entrance of drum；704: the second outlet of drum；8: outer
Portion's steam flow control valve；9: water main flow control valve；10: anti-crosswind baffle；11: the wear-resisting convection recuperator of level-one multitube
Flow of inlet water regulating valve；12: the wear-resisting convection recuperator flow of inlet water regulating valve of second level multitube；13: the wear-resisting convection current of three-level multitube is changed
Hot device flow of inlet water regulating valve；14: the wear-resisting convection recuperator outlet vapor flow control valve of level-one multitube；15: level-one multitube is resistance to
Convection recuperator is ground to drum Water flow adjusting valve；16: drum to the wear-resisting convection recuperator Water flow adjusting valve of second level multitube；
17: the wear-resisting convection recuperator of second level multitube to drum Water flow adjusting valve；18: the wear-resisting convection recuperator outlet vapor of second level multitube
Flow control valve；19: drum to the wear-resisting convection recuperator steam flow control valve of three-level multitube；20: the wear-resisting convection current of three-level multitube
Heat exchanger exit steam flow control valve；K: control system；
L1: steam main pipe；L2: external steam pipeline；L3: first pipe；L4: second pipe；L5: third pipeline；L6: the
Four pipelines；L7: the five pipeline；L8: drum down-comer；L9: drum tedge；L10: the six pipeline；L11: the seven pipeline；L12:
8th pipeline；L13: water main；
M1: the first test point；M2: the second test point；M3: third test point；M4: the four test point；M5: the five detection
Point；M6: the six test point.
Specific embodiment
The first embodiment according to the present invention provides a kind of side sintering machine tail waste heat multiple spot recycling and efficiently utilized
Method:
A kind of method sintering machine tail waste heat multiple spot recycling and efficiently utilized, method includes the following steps:
1) sinter mixture is packed on sintering pallet 1 and is lighted a fire, start to be sintered；
2) top of sintering machine tail portion loop 2 is equipped with radiation recuperator 3, and water supply enters radiation recuperator 3 and loop 2
On empty station vehicle 1 carry out heat exchange, water supply heating becomes water at low temperature；
3) corresponding 5 position of flue of several bellows 4 of sintering machine tail portion (or rear end) is equipped with convection recuperator 6, water at low temperature
Heat exchange is carried out into the high-temperature flue gas in convection recuperator 6, with flue 5, water at low temperature generates steam after high-temperature flue gas heats；
4) steam is for users to use.
Preferably, in step 3), the convection recuperator 6 be the wear-resisting convection recuperator of multi-stage multi-pipe, preferably 2-5 grades
The wear-resisting convection recuperator of multitube, the more preferably 3-4 grades of wear-resisting convection recuperator of multitube.
Preferably, whether convection recuperator 6 is greater than according to the maximum quantity of steam that the fume afterheat in flue 5 can generate
Pipeline allow MCR steam flow, judge it is series operation or simultaneously through transport between the wear-resisting convection recuperator of multitubes at different levels
Row.
Preferably, the maximum quantity of steam that the fume afterheat in flue 5 can generate is less than the pipeline of convection recuperator 6
When the MCR steam flow of permission, series operation between the wear-resisting convection recuperators of multitube at different levels.
When the pipeline that the maximum quantity of steam that the fume afterheat in flue 5 can generate is more than or equal to convection recuperator 6 allows
MCR steam flow when, parallel running between the wear-resisting convection recuperators of multitube at different levels.
In the present invention, whether the maximum quantity of steam that the fume afterheat according in flue 5 can generate is greater than convection current
The MCR steam flow that the pipeline of heat exchanger 6 allows judges to be series operation or simultaneously between the wear-resisting convection recuperator of multitubes at different levels
Through transport row, specific judgment method are as follows:
A) calculate the maximum quantity of steam that the fume afterheat in flue 5 can generate: setting the fume afterheat in flue 5 can produce
Raw maximum quantity of steam is Qs, the steam enthalpy for meeting user's needs is h0, detect the low-temperature hydrothermal before entering convection recuperator 6
Enthalpy is hs, the sum of the flue gas flow for detecting several bellows 4 after convection recuperator 6 is Qy, detect convection recuperator 6 and high-temperature flue gas
The flue-gas temperature of flue 5 is T before exchanging heaty1, detection convection recuperator 6 and the flue-gas temperature of high-temperature flue gas heat exchange rear pass 5 are
Ty2, the heat that the heat and convection recuperator 6 released by the high-temperature flue gas in flue 5 are absorbed is equal, it obtains:
Qs×(h0-hs)=Qy×(Ty1-Ty2) (1),
It can be obtained by formula (1), the maximum quantity of steam that the fume afterheat in flue 5 can generate are as follows:
B) calculate the MCR steam flow that the pipeline of convection recuperator 6 allows: the pipeline for setting convection recuperator 6 allows most
Big steam flow is Qg, the pipe diameter for measuring convection recuperator 6 is D, economic stream of the steam in the pipeline of convection recuperator 6
Speed is V, is obtained:
Qg=D2×0.785×V (3)；
C) judge what the pipeline for the maximum quantity of steam and convection recuperator 6 that the fume afterheat in flue 5 can generate allowed
Size between MCR steam flow.
In the present invention, series operation between the wear-resisting convection recuperator of multitube at different levels, specifically:
The water at low temperature come out from radiation recuperator 3 is introduced into the wear-resisting convection recuperator 6a of level-one multitube, and fume afterheat will be low
Warm water is heated into saturated water or unsaturated water, and saturated water or unsaturated water enter drum 7, and the unsaturated water in drum 7 enters two
Unsaturated water is heated into saturated water by the grade wear-resisting convection recuperator 6b of multitube, fume afterheat, and saturated water is back to drum 7, drum 7
The saturated vapor of generation enters the wear-resisting convection recuperator 6c of three-level multitube, and saturated vapor is thermally formed overheat through high-temperature flue gas and steams
Vapour.
In the present invention, parallel running between the wear-resisting convection recuperator of multitube at different levels, specifically:
The water at low temperature parallel connection come out from radiation recuperator 3 enters the wear-resisting convection recuperator of multitubes at different levels, and multitubes at different levels are wear-resisting
Water at low temperature in convection recuperator generates steam after high-temperature flue gas heats.
Preferably, in step 4), steam is sent out for users to use through steam main pipe L1.
Preferably, external steam pipeline L2 is also connected on steam main pipe L1.External steam is via external steam pipeline
L2 is introduced, after mixing with the steam in steam main pipe L1 for users to use.Preferably, external steam pipeline L2 introducing was
Hot steam.
Preferably, in step 4), on steam main pipe L1, external steam pipeline L2 be incorporated into the upstream of steam main pipe L1
First test point M1 is set.Second test point M2 is set on external jet chimney L2.Steaming is incorporated into external jet chimney L2
Third test point M3 is arranged in the downstream of vapour main pipe L1.The steam flow Q of first test point M1 on-line checking corresponding position1And steaming
Vapour heat content h1.The steam flow Q of second test point M2 on-line checking corresponding position2With steam enthalpy h2.Third test point M3 exists
The steam flow Q of line detection corresponding position3With steam enthalpy h3。
Preferably, when the fume afterheat resource in flue 5 is constant or increases, the steam stream in 6 exit of convection recuperator
Measure Q1With steam enthalpy h1, can satisfy steam flow Q required for user0With steam enthalpy h0。
When the fume afterheat resource in flue 5 is reduced, the first test point M1 detects steam enthalpy by h1It is reduced to h'1When, it supplies
The steam that user uses is regulated and controled by three kinds of control models.
In the present invention, the first control model of steam for users to use is the control model of " guaranteeing both quality and quantity ", specifically
Are as follows: the steam flow Q required for user provides0With steam enthalpy h0When, the first test point M1 detects convection recuperator 6 and exports
Place's steam flow is Q1, steam enthalpy h'1, it is h that the second test point M2, which detects external steam heat content,2, set the second test point M2
Steam flow at position is Q2 set, the steam flow at the position third test point M3 is set as Q3 set；
Both it is equal to by the sum of 6 the included heat of exit steam of convection recuperator and the included heat of external steam and is mixed
Steam total amount of heat afterwards can obtain:
Q1×h′1+Q2 set×h2=Q3 set×h0(4),
It is equal to quality of steam after the two mixes with external steam quality sum by 6 exit quality of steam of convection recuperator,
It can obtain:
Q3 set=Q1+Q2 set(5),
By formula (4) and (5) to get:
External steam flow Q at this time2 setIt only can guarantee that mixed steam enthalpy is h0, but cannot be guaranteed mixed steam
Flow Q3 setIt can satisfy the steam flow Q of user's requirement0；Compare the steam flow Q of user's requirement0With it is obtained in formula (5)
Mixed steam flow Q3 setSize, further to external steam flow Q2 setCarry out value:
Work as Q0< Q3 setWhen,
Work as Q0> Q3 setWhen, Q2 set=Q0-Q1(8)；
The aperture for adjusting the external steam flow control valve 8 on external steam pipeline L2, so that external steam pipeline L2 institute
The steam flow of introducing is Q2 set。
In the present invention, second of the control model of steam for users to use is the control model of " decrement of guaranteeing the quality ", specifically
Are as follows: the steam enthalpy h required for user only provides0When, close the external steam flow control valve on external steam pipeline L2
It is Q that 8, the first test point M1, which detect 6 exit steam flow of convection recuperator,1, steam enthalpy h'1, setting feedwater flow should adjust
Whole is Q1 sets, had according to law of conservation of energy:
Q1×h′1=Q1 sets×h0(9),
By formula (9), can obtain:
The aperture for adjusting the water main flow control valve 9 of 3 inlet of radiation recuperator, so that into radiation recuperator 3
Feedwater flow be Q1 sets。
In the present invention, the third control model of steam for users to use is the control model of " guarantor that degrades amount ", specifically
Are as follows: when user only provides steam flow Q required for satisfaction0When, close the external steam flow tune on external steam pipeline L2
Valve 8 is saved, guarantees feedwater flow Q1It is constant.
Preferably, in step 2), the radiation recuperator 3 is wave-fin pipe radiation recuperator.Wave-fin pipe spoke
Penetrating heat exchanger includes coiled pipe 301 and the helical fin 302 for being enclosed in 301 periphery of coiled pipe.
Preferably, in step 3), several bellows 4 of the sintering machine tail portion are inverse the 1-10th of sintering machine tail portion
Bellows 4, preferably inverse 2-8 bellows 4, more preferably inverse 3-6 bellows 4.
Preferably, anti-crosswind baffle 10 is additionally provided with around radiation recuperator 3.
Preferably, guarantor is laid with outside the corresponding wind box branch pipe 401 of sintering machine tail portion bellows 4 and (tail portion) flue 5
Adiabator.
Preferably, being additionally provided with control system K.Control system K is connected and is controlled external steam flow control valve 8, water supply
The operation of general pipeline flow control valve 9.
Second of embodiment according to the present invention, provides a kind of sintering machine tail waste heat multiple spot recycling and efficient utilize fills
It sets:
A kind of recycling of sintering machine tail waste heat multiple spot and efficient utilization device or the device for the above method, the device include
Loop 2 is equipped with below the tail portion sintering machine A, sintering machine A.Multiple bellows 4 are equipped with below the trolley 1 of sintering machine A.Each bellows 4 are logical
Cross the flue 5 that respective wind box branch pipe 401 is connected to lower part.The device further includes radiation recuperator 3 and convection recuperator 6.Its
The top of loop 2 is arranged in middle radiation recuperator 3.Several bellows 4 that the tail portion sintering machine A is arranged in convection recuperator 6 are corresponding
Flue 5 on.The water out 304 of radiation recuperator 3 is connected to the entrance of convection recuperator 6.
Preferably, the convection recuperator 6 is the wear-resisting convection recuperator of multi-stage multi-pipe, and preferably 2-5 grades of multitube is wear-resisting
The wear-resisting convection recuperator of convection recuperator, more preferably 3-4 grade multitube.
Preferably, which further includes drum 7.Wherein, the water out 304 of radiation recuperator 3 is via first pipe L3
It is connected to the first entrance 6c01 of the wear-resisting convection recuperator 6c of three-level multitube.Second pipe L4 connection is separated from first pipe L3
To the entrance 6a01 of the wear-resisting convection recuperator 6a of level-one multitube.Third pipeline L5 is separated from first pipe L3, and to be connected to second level more
Manage the first entrance 6b01 of wear-resisting convection recuperator 6b.The outlet 6a02 of the wear-resisting convection recuperator 6a of level-one multitube is via the 4th pipe
Road L6 is connected to steam main pipe L1.The first entrance 701 that the 5th pipeline L7 is connected to drum 7 is separated from the 4th pipeline L6.Vapour
The first outlet 702 of packet 7 is connected to the second entrance 6b03 of the wear-resisting convection recuperator 6b of second level multitube via drum down-comer L8.
The outlet 6b02 of the wear-resisting convection recuperator 6b of second level multitube is connected to the second entrance 703 of drum 7 via drum tedge L9.From
The 6th pipeline L10, which is separated, on drum tedge L9 is connected to steam main pipe L1.The second outlet 704 of drum 7 is via the 7th pipeline
L11 is connected to the second entrance 6c03 of the wear-resisting convection recuperator 6c of three-level multitube.The wear-resisting convection recuperator 6c's of three-level multitube goes out
Mouth 6c02 is connected to steam main pipe L1 via the 8th pipeline L12.
Preferably, second pipe L4 is equipped with the wear-resisting convection recuperator flow of inlet water regulating valve 11 of level-one multitube.Third
Pipeline L5 is equipped with the wear-resisting convection recuperator flow of inlet water regulating valve 12 of second level multitube.It is wear-resisting that first pipe L3 is equipped with three-level multitube
Convection recuperator flow of inlet water regulating valve 13.It is resistance to that level-one multitube is equipped in the downstream that the 4th pipeline L6 separates the 5th position pipeline L7
Grind convection recuperator outlet vapor flow control valve 14.5th pipeline L7 is equipped with the wear-resisting convection recuperator of level-one multitube to drum
Water flow adjusting valve 15.Drum down-comer L8 is equipped with drum to the wear-resisting convection recuperator Water flow adjusting valve 16 of second level multitube.
The wear-resisting convection recuperator of second level multitube is equipped with to drum water flow in the downstream that drum tedge L9 separates the 6th position pipeline L10
Regulating valve 17.6th pipeline L10 is equipped with the wear-resisting convection recuperator outlet vapor flow control valve 18 of second level multitube.7th pipeline
L11 is equipped with drum to the wear-resisting convection recuperator steam flow control valve 19 of three-level multitube.It is more that 8th pipeline L12 is equipped with three-level
Manage wear-resisting convection recuperator outlet vapor flow control valve 20.
In the present invention, the 4th test point M4 is set in 5 position of flue of 6 upstream of convection recuperator.In convection recuperator
The 5th test point M5 is arranged in the flue position in downstream.6th test point M6 is set on first pipe L3.
Preferably, which further includes water main L13, and water main L13 is connected to the entrance of radiation recuperator 3
303。
Preferably, water main flow control valve 9 is equipped on water main L13.
Preferably, external steam pipeline L2 is also connected on steam main pipe L1.
Preferably, external steam pipeline L2 is equipped with external steam flow control valve 8.
In the present invention, on steam main pipe L1, external steam pipeline L2 be incorporated into the upstream setting the of steam main pipe L1
One test point M1.Second test point M2 is set on external jet chimney L2.Steam main pipe is incorporated into external jet chimney L2
Third test point M3 is arranged in the downstream of L1.
Preferably, the radiation recuperator 3 is wave-fin pipe radiation recuperator.Wave-fin pipe radiation recuperator packet
It includes coiled pipe 301 and is enclosed in the helical fin 302 of 301 periphery of coiled pipe.
Preferably, several bellows 4 of the tail portion the sintering machine A are the inverse 1-10 bellows 4 of sintering machine tail portion, excellent
It is selected as inverse 2-8 bellows 4, more preferably inverse 3-6 bellows 4.
Preferably, being additionally provided with anti-crosswind baffle 10 around radiation recuperator 3.
Preferably, being laid with guarantor outside the corresponding wind box branch pipe 401 of the tail portion sintering machine A bellows 4 and (tail portion) flue 5
Adiabator.
Preferably, which further includes control system K.Control system K is connected and is controlled external steam flow control valve
8, the wear-resisting convection recuperator flow of inlet water regulating valve 11 of water main flow control valve 9, level-one multitube, the wear-resisting convection current of second level multitube
The wear-resisting convection recuperator flow of inlet water regulating valve 13 of heat exchanger flow of inlet water regulating valve 12, three-level multitube, level-one multitube are wear-resisting right
Flow heat exchanger exit steam flow control valve 14, the wear-resisting convection recuperator of level-one multitube to drum Water flow adjusting valve 15, drum
It is adjusted to the wear-resisting convection recuperator Water flow adjusting valve 16 of second level multitube, the wear-resisting convection recuperator of second level multitube to drum water flow
The wear-resisting convection recuperator outlet vapor flow control valve 18 of valve 17, second level multitube, drum to the wear-resisting convection recuperator of three-level multitube
The operation of the wear-resisting convection recuperator outlet vapor flow control valve 20 of steam flow control valve 19, three-level multitube.
Embodiment 1
A kind of method sintering machine tail waste heat multiple spot recycling and efficiently utilized, method includes the following steps:
1) sinter mixture is packed on sintering pallet 1 and is lighted a fire, start to be sintered；
2) top of sintering machine tail portion loop 2 is equipped with radiation recuperator 3, and water supply enters radiation recuperator 3 and loop 2
On empty station vehicle 1 carry out heat exchange, water supply heating becomes water at low temperature；
3) corresponding 5 position of flue of several bellows 4 of sintering machine tail portion is equipped with convection recuperator 6, and water at low temperature enters convection current
High-temperature flue gas in heat exchanger 6, with flue 5 carries out heat exchange, and water at low temperature generates steam after high-temperature flue gas heats；
4) steam is for users to use.
In step 3), the convection recuperator 6 is the wear-resisting convection recuperator of three-level multitube.More than the flue gas in flue 5
Whether the maximum quantity of steam that heat can generate is greater than the MCR steam flow that the pipeline of convection recuperator 6 allows, and judges at different levels more
Manage is series operation or parallel running between wear-resisting convection recuperator.When the maximum that the fume afterheat in flue 5 can generate
When the MCR steam flow that the pipeline that quantity of steam is less than convection recuperator 6 allows, gone here and there between the wear-resisting convection recuperators of multitube at different levels
Through transport row.Allow when the pipeline that the maximum quantity of steam that the fume afterheat in flue 5 can generate is more than or equal to convection recuperator 6
When MCR steam flow, parallel running between the wear-resisting convection recuperators of multitube at different levels.
Whether the maximum quantity of steam that the fume afterheat according in flue 5 can generate is greater than the pipe of convection recuperator 6
The MCR steam flow that road allows judges it is series operation or parallel running between the wear-resisting convection recuperator of multitubes at different levels, specifically
Judgment method are as follows:
A) calculate the maximum quantity of steam that the fume afterheat in flue 5 can generate: setting the fume afterheat in flue 5 can produce
Raw maximum quantity of steam is Qs, the steam enthalpy for meeting user's needs is h0, detect the low-temperature hydrothermal before entering convection recuperator 6
Enthalpy is hs, the sum of the flue gas flow for detecting several bellows 4 after convection recuperator 6 is Qy, detect convection recuperator 6 and high-temperature flue gas
The flue-gas temperature of flue 5 is T before exchanging heaty1, detection convection recuperator 6 and the flue-gas temperature of high-temperature flue gas heat exchange rear pass 5 are
Ty2, the heat that the heat and convection recuperator 6 released by the high-temperature flue gas in flue 5 are absorbed is equal, it obtains:
Qs×(h0-hs)=Qy×(Ty1-Ty2) (1),
It can be obtained by formula (1), the maximum quantity of steam that the fume afterheat in flue 5 can generate are as follows:
B) calculate the MCR steam flow that the pipeline of convection recuperator 6 allows: the pipeline for setting convection recuperator 6 allows most
Big steam flow is Qg, the pipe diameter for measuring convection recuperator 6 is D, economic stream of the steam in the pipeline of convection recuperator 6
Speed is V, is obtained:
Qg=D2×0.785×V (3)；
C) judge what the pipeline for the maximum quantity of steam and convection recuperator 6 that the fume afterheat in flue 5 can generate allowed
Size between MCR steam flow.
Series operation between the wear-resisting convection recuperator of multitube at different levels, specifically: the low temperature come out from radiation recuperator 3
Water is introduced into the wear-resisting convection recuperator 6a of level-one multitube, and water at low temperature is heated into saturated water or unsaturated water by fume afterheat, saturation
Water or unsaturated water enter drum 7, and the unsaturated water in drum 7 enters the wear-resisting convection recuperator 6b of second level multitube, fume afterheat
Unsaturated water is heated into saturated water, saturated water is back to drum 7, and it is resistance to that the saturated vapor that drum 7 generates enters three-level multitube
Convection recuperator 6c is ground, saturated vapor is thermally formed superheated steam through high-temperature flue gas.
Parallel running between the wear-resisting convection recuperator of multitube at different levels, specifically: the low temperature come out from radiation recuperator 3
Water parallel connection enters the wear-resisting convection recuperator of multitubes at different levels, and the water at low temperature in the wear-resisting convection recuperators of multitube at different levels adds through high-temperature flue gas
Steam is generated after heat.
Embodiment 2
Embodiment 1 is repeated, only in step 4), steam is sent out for users to use through steam main pipe L1.On steam main pipe L1
It is also connected with external steam pipeline L2.External steam is introduced via external steam pipeline L2, mixed with the steam in steam main pipe L1
After conjunction for users to use.What external steam pipeline L2 was introduced is superheated steam.
In step 4), on steam main pipe L1, external steam pipeline L2 be incorporated into steam main pipe L1 upstream setting first
Test point M1.Second test point M is set on external jet chimney L22.It is incorporated into steam main pipe L1's in external jet chimney L2
Third test point M is arranged in downstream3.First test point M1The steam flow Q of on-line checking corresponding position1With steam enthalpy h1.The
Two test point M2The steam flow Q of on-line checking corresponding position2With steam enthalpy h2.Third test point M3On-line checking is corresponding
Steam flow Q at position3With steam enthalpy h3。
When fume afterheat resource in flue 5 is constant or increases, the steam flow Q in 6 exit of convection recuperator1And steam
Heat content h1, can satisfy steam flow Q required for user0With steam enthalpy h0。
As the fume afterheat resource reduction in flue 5, the first test point M1Detect steam enthalpy by h1It is reduced to h'1When, it supplies
The steam that user uses is regulated and controled by three kinds of control models.
The first control model of steam for users to use is the control model of " guaranteeing both quality and quantity ", specifically: when user mentions
For required steam flow Q0With steam enthalpy h0When, the first test point M1Detecting 6 exit steam flow of convection recuperator is
Q1, steam enthalpy h'1, the second test point M2Detection external steam heat content is h2, set the second test point M2Steam at position
Flow is Q2 set, set third test point M3Steam flow at position is Q3 set；
Both it is equal to by the sum of 6 the included heat of exit steam of convection recuperator and the included heat of external steam and is mixed
Steam total amount of heat afterwards can obtain:
Q1×h′1+Q2 set×h2=Q3 set×h0(4),
It is equal to quality of steam after the two mixes with external steam quality sum by 6 exit quality of steam of convection recuperator,
It can obtain:
Q3 set=Q1+Q2 set(5),
By formula (4) and (5) to get:
External steam flow Q at this time2 setIt only can guarantee that mixed steam enthalpy is h0, but cannot be guaranteed mixed steam
Flow Q3 setIt can satisfy the steam flow Q of user's requirement0；Compare the steam flow Q of user's requirement0With it is obtained in formula (5)
Mixed steam flow Q3 setSize, further to external steam flow Q2 setCarry out value:
Work as Q0< Q3If when,
Work as Q0> Q3 setWhen, Q2 set=Q0-Q1(8)；
The aperture for adjusting the external steam flow control valve 8 on external steam pipeline L2, so that external steam pipeline L2 institute
The steam flow of introducing is Q2 set。
Second of the control model of steam for users to use be " decrement of guaranteeing the quality " control model, specifically: when user only
Steam enthalpy h required for providing0When, close the external steam flow control valve 8 on external steam pipeline L2, the first test point
M1Detection 6 exit steam flow of convection recuperator is Q1, steam enthalpy h'1, Q should be adjusted to by setting feedwater flow1 sets, according to
Law of conservation of energy has:
Q1×h′1=Q1 sets×h0(9),
By formula (9), can obtain:
The aperture for adjusting the water main flow control valve 9 of 3 inlet of radiation recuperator, so that into radiation recuperator 3
Feedwater flow be Q1 sets。
The third control model of steam for users to use be " guarantor that degrades amount " control model, specifically: when user only
Steam flow Q required for meeting is provided0When, close external steam pipeline L2 on external steam flow control valve 8, guarantee to
Water flow Q1It is constant.
In step 2), the radiation recuperator 3 is wave-fin pipe radiation recuperator.Wave-fin pipe radiation recuperator packet
It includes coiled pipe 301 and is enclosed in the helical fin 302 of 301 periphery of coiled pipe.Anti- side is additionally provided with around radiation recuperator 3
Windshield plate 10.
In step 3), several bellows 4 of the sintering machine tail portion are the inverse 3-6 bellows 4 of sintering machine tail portion.It is burning
Thermal insulation material is laid with outside the knot corresponding wind box branch pipe 401 of drive end unit bellows 4 and back-end ductwork 5.
It is additionally provided with control system K.Control system K connects and controls external steam flow control valve 8, water main flow tune
Save the operation of valve 9.
Embodiment 3
As shown in Figures 2 and 3, a kind of sintering machine tail waste heat multiple spot recycling and efficient utilization device, the device include sintering machine
Loop 2 is equipped with below the tail portion A, sintering machine A.Multiple bellows 4 are equipped with below the trolley 1 of sintering machine A.Each bellows 4 pass through respective
Wind box branch pipe 401 be connected to the flue 5 of lower part.The device further includes radiation recuperator 3 and convection recuperator 6.Wherein radiate
The top of loop 2 is arranged in heat exchanger 3.The corresponding flue 5 of several bellows 4 of the tail portion sintering machine A is arranged in convection recuperator 6
On.The water out 304 of radiation recuperator 3 is connected to the entrance of convection recuperator 6.
The convection recuperator 6 is the wear-resisting convection recuperator of three-level multitube.
The device further includes drum 7.Wherein, the water out 304 of radiation recuperator 3 is connected to three-level via first pipe L3
The first entrance 6c01 of the wear-resisting convection recuperator 6c of multitube.Second pipe L4 is separated from first pipe L3 is connected to level-one multitube
The entrance 6a01 of wear-resisting convection recuperator 6a.Third pipeline L5 is separated from first pipe L3 is connected to the wear-resisting convection current of second level multitube
The first entrance 6b01 of heat exchanger 6b.The outlet 6a02 of the wear-resisting convection recuperator 6a of level-one multitube is connected to via the 4th pipeline L6
Steam main pipe L1.The first entrance 701 that the 5th pipeline L7 is connected to drum 7 is separated from the 4th pipeline L6.The first of drum 7 goes out
Mouth 702 is connected to the second entrance 6b03 of the wear-resisting convection recuperator 6b of second level multitube via drum down-comer L8.Second level multitube is resistance to
The outlet 6b02 of mill convection recuperator 6b is connected to the second entrance 703 of drum 7 via drum tedge L9.From drum tedge
The 6th pipeline L10 is separated on L9 is connected to steam main pipe L1.The second outlet 704 of drum 7 is connected to three via the 7th pipeline L11
The second entrance 6c03 of the wear-resisting convection recuperator 6c of grade multitube.The outlet 6c02 of the wear-resisting convection recuperator 6c of three-level multitube is via
Eight pipeline L12 are connected to steam main pipe L1.
Second pipe L4 is equipped with the wear-resisting convection recuperator flow of inlet water regulating valve 11 of level-one multitube.It is set on third pipeline L5
There is the wear-resisting convection recuperator flow of inlet water regulating valve 12 of second level multitube.First pipe L3 is equipped with the wear-resisting convection recuperator of three-level multitube
Flow of inlet water regulating valve 13.The wear-resisting heat convection of level-one multitube is equipped in the downstream that the 4th pipeline L6 separates the 5th position pipeline L7
Device outlet vapor flow control valve 14.5th pipeline L7 is equipped with the wear-resisting convection recuperator of level-one multitube to drum water flow and adjusts
Valve 15.Drum down-comer L8 is equipped with drum to the wear-resisting convection recuperator Water flow adjusting valve 16 of second level multitube.Rise in drum
The downstream that pipe L9 separates the 6th position pipeline L10 is equipped with the wear-resisting convection recuperator of second level multitube to drum Water flow adjusting valve 17.
6th pipeline L10 is equipped with the wear-resisting convection recuperator outlet vapor flow control valve 18 of second level multitube.7th pipeline L11 is equipped with
Drum is to the wear-resisting convection recuperator steam flow control valve 19 of three-level multitube.It is wear-resisting right that 8th pipeline L12 is equipped with three-level multitube
Flow heat exchanger exit steam flow control valve 20.
In 5 position of flue of 6 upstream of convection recuperator, the 4th test point M is set4.In the flue position in convection recuperator downstream
Install the 5th test point M5.6th test point M is set on first pipe L36。
The device further includes water main L13, and water main L13 is connected to the entrance 303 of radiation recuperator 3.In water supply
General pipeline L13 is equipped with water main flow control valve 9.
As shown in Figures 4 and 5, the radiation recuperator 3 is wave-fin pipe radiation recuperator.Wave-fin pipe radiation heat transfer
Device includes coiled pipe 301 and the helical fin 302 for being enclosed in 301 periphery of coiled pipe.
Several bellows 4 of the tail portion the sintering machine A are the inverse 3-6 bellows 4 of sintering machine tail portion.
Embodiment 4
Embodiment 3 is repeated, external steam pipeline L2 is only also connected on steam main pipe L1.It is set on external steam pipeline L2
There is external steam flow control valve 8.
On steam main pipe L1, external steam pipeline L2 be incorporated into steam main pipe L1 upstream be arranged the first test point M1。
Second test point M is set on external jet chimney L22.It is arranged in the downstream that external jet chimney L2 is incorporated into steam main pipe L1
Third test point M3。
Embodiment 5
Embodiment 4 is repeated, anti-crosswind baffle 10 is only additionally provided with around radiation recuperator 3.
Embodiment 6
Embodiment 5 is repeated, is only applied outside the corresponding wind box branch pipe 401 of the tail portion sintering machine A bellows 4 and back-end ductwork 5
Equipped with thermal insulation material.
Embodiment 7
Embodiment 6 is repeated, only the device further includes control system K.Control system K is connected and is controlled external steam flow
The wear-resisting convection recuperator flow of inlet water regulating valve 11 of regulating valve 8, water main flow control valve 9, level-one multitube, second level multitube are resistance to
Grind convection recuperator flow of inlet water regulating valve 12, the wear-resisting convection recuperator flow of inlet water regulating valve 13 of three-level multitube, level-one multitube
Wear-resisting convection recuperator outlet vapor flow control valve 14, the wear-resisting convection recuperator of level-one multitube to drum Water flow adjusting valve
15, drum is to the wear-resisting convection recuperator Water flow adjusting valve 16 of second level multitube, the wear-resisting convection recuperator of second level multitube to drum water
The wear-resisting convection recuperator outlet vapor flow control valve 18 of flow control valve 17, second level multitube, drum are wear-resisting right to three-level multitube
Flow the operation of heat exchanger steam flow control valve 19, the wear-resisting convection recuperator outlet vapor flow control valve 20 of three-level multitube.
Embodiment 8
A kind of control method of sintering machine tail waste heat multiple spot recycling and efficient utilization device, using the device in embodiment 7,
Method includes the following steps:
1) device brings into operation；
2) steam parameter needed for setting user: steam flow Q0And/or steam enthalpy h0；
3) control system K real-time monitoring third test point M3The steam flow Q measured3With steam enthalpy h3；
4) control system K judgment step 3) in detected steam parameter whether meet wanting for steam parameter needed for user
It asks；If meeting the requirements, return step 3)；If being unsatisfactory for requiring, step 5) is carried out；
5) whether the maximum quantity of steam that control system K judges that the fume afterheat in flue 5 can generate is greater than heat convection
The MCR steam flow that the pipeline of device 6 allows；If so, carrying out step 6)；If it is not, then carrying out step 7)；
6) pipeline that the maximum quantity of steam that the fume afterheat in flue 5 can generate is more than or equal to convection recuperator 6 allows
MCR steam flow, parallel running between the wear-resisting convection recuperators of multitube at different levels, control system K opens corresponding valve
Close control: the wear-resisting convection recuperator flow of inlet water regulating valve 11 of control system K control level-one multitube, the wear-resisting convection current of level-one multitube are changed
Hot device outlet vapor flow control valve 14 is opened, and the wear-resisting convection recuperator of level-one multitube to drum Water flow adjusting valve 15 is closed；
The wear-resisting convection recuperator outlet vapor flow of the wear-resisting convection recuperator flow of inlet water regulating valve 12 of second level multitube, second level multitube is adjusted
Valve 18 is opened, and drum to the wear-resisting convection recuperator Water flow adjusting valve 16 of second level multitube, the wear-resisting convection recuperator of second level multitube is extremely
Drum Water flow adjusting valve 17 is closed；The wear-resisting convection recuperator flow of inlet water regulating valve 13 of three-level multitube, three-level multitube are wear-resisting right
It flows heat exchanger exit steam flow control valve 20 to open, drum to the wear-resisting convection recuperator steam flow control valve 19 of three-level multitube
It closes；
Then step 8) is carried out；
7) pipeline that the maximum quantity of steam that the fume afterheat in flue 5 can generate is less than convection recuperator 6 allows most
Control is opened and closed to corresponding valve in big steam flow, series operation between the wear-resisting convection recuperators of multitube at different levels, control system K
System: control system K controls the wear-resisting convection recuperator flow of inlet water regulating valve 11 of level-one multitube, the wear-resisting convection recuperator of level-one multitube
It is opened to drum Water flow adjusting valve 15, the wear-resisting convection recuperator outlet vapor flow control valve 14 of level-one multitube is closed, drum
It is adjusted to the wear-resisting convection recuperator Water flow adjusting valve 16 of second level multitube, the wear-resisting convection recuperator of second level multitube to drum water flow
Valve 17 is opened, and the wear-resisting convection recuperator outlet of the wear-resisting convection recuperator flow of inlet water regulating valve 12 of second level multitube, second level multitube is steamed
Steam flow adjustable valve 18 is closed, and drum is wear-resisting to the wear-resisting convection recuperator steam flow control valve 19 of three-level multitube, three-level multitube
Convection recuperator outlet vapor flow control valve 20 is opened, and the wear-resisting convection recuperator flow of inlet water regulating valve 13 of three-level multitube is closed
It closes；
Then step 8) is carried out；
8) control system K steam parameter value according to needed for user set in step 2) selects corresponding control model:
1. when concurrently setting steam flow Q in step 2)0With steam enthalpy h0When, control system K selects " guaranteeing both quality and quantity "
Control model: control system K is to the first test point M1With the second test point M2Steam parameter detected, calculate needed for draw
The external steam flow Q entered2 set, control system K passes through the aperture for adjusting external steam flow control valve 8, so that introduced is outer
Portion's steam flow is Q2 set；
2. when only setting steam enthalpy h in step 2)0When, control system K selects the control model of " decrement of guaranteeing the quality ": control
System K is to the first test point M1Steam parameter detected, calculate feedwater flow Q adjusted1 sets, control system K control
External steam flow control valve 8 is closed, the aperture of water main flow control valve 9 is adjusted, so that giving into radiation recuperator 3
Water flow is Q1 sets；
3. when only setting steam flow Q in step 2)0When, control system K selects the control model of " guarantor that degrades amount ": control
External steam flow control valve 8 is closed in system K control, guarantees feedwater flow Q1It is constant；
9) control system K judges third test point M3Steam parameter whether meet steam parameter requirement needed for user；If
It meets the requirements, then return step 3)；If being unsatisfactory for requiring, return step 8).
Claims (34)
1. a kind of method sintering machine tail waste heat multiple spot recycling and efficiently utilized, method includes the following steps:
1) sinter mixture is packed on sintering pallet (1) and is lighted a fire, start to be sintered；
2) top of sintering machine tail portion loop (2) is equipped with radiation recuperator (3), and water supply enters radiation recuperator (3) and carriage return
Empty station vehicle (1) on road (2) carries out heat exchange, and water supply heating becomes water at low temperature；
3) corresponding flue (5) position of several bellows (4) of sintering machine tail portion is equipped with convection recuperator (6), water at low temperature entrance pair
The high-temperature flue gas flowed in heat exchanger (6), with flue (5) carries out heat exchange, and water at low temperature generates steam, institute after high-temperature flue gas heats
Stating convection recuperator (6) is the wear-resisting convection recuperator of multi-stage multi-pipe；
4) steam is for users to use；
Wherein: whether being greater than the pipe of convection recuperator (6) according to the maximum quantity of steam that the fume afterheat in flue (5) can generate
The MCR steam flow that road allows, judges between the wear-resisting convection recuperator of multitubes at different levels to be series operation or parallel running.
2. according to the method described in claim 1, it is characterized by: the convection recuperator (6) is 2-5 grades more in step 3)
Manage wear-resisting convection recuperator；
When the pipeline that the maximum quantity of steam that the fume afterheat in flue (5) can generate is less than convection recuperator (6) allows most
When big steam flow, series operation between the wear-resisting convection recuperators of multitube at different levels；
When the pipeline that the maximum quantity of steam that the fume afterheat in flue (5) can generate is more than or equal to convection recuperator (6) allows
MCR steam flow when, parallel running between the wear-resisting convection recuperators of multitube at different levels.
3. according to the method described in claim 2, it is characterized by: the convection recuperator (6) is 3-4 grades more in step 3)
Manage wear-resisting convection recuperator.
4. according to the method described in claim 1, it is characterized by: the fume afterheat according in flue (5) can generate
Maximum quantity of steam whether be greater than convection recuperator (6) pipeline allow MCR steam flow, judge that multitubes at different levels are wear-resisting right
Flowing between heat exchanger is series operation or parallel running, specific judgment method are as follows:
A) calculate the maximum quantity of steam that the fume afterheat in flue (5) can generate: the fume afterheat set in flue (5) can produce
Raw maximum quantity of steam is Qs, the steam enthalpy for meeting user's needs is h0, detect the water at low temperature before entering convection recuperator (6)
Heat content is hs, the sum of flue gas flow of several bellows (4) is Q after detection convection recuperator (6)y, detection convection recuperator (6) with
The flue-gas temperature of flue (5) is T before high-temperature flue gas exchanges heaty1, detection convection recuperator (6) and high-temperature flue gas exchange heat rear pass (5)
Flue-gas temperature be Ty2, heat phase that the heat and convection recuperator (6) released by the high-temperature flue gas in flue (5) are absorbed
Deng obtaining:
Qs×(h0-hs)=Qy×(Ty1-Ty2) (1),
It can be obtained by formula (1), the maximum quantity of steam that the fume afterheat in flue (5) can generate are as follows:
B) calculate the MCR steam flow that the pipeline of convection recuperator (6) allows: the pipeline for setting convection recuperator (6) allows most
Big steam flow is Qg, the pipe diameter for measuring convection recuperator (6) is D, warp of the steam in the pipeline of convection recuperator (6)
Ji flow velocity is V, is obtained:
Qg=D2×0.785×V (3)；
C) judge what the pipeline for the maximum quantity of steam and convection recuperator (6) that the fume afterheat in flue (5) can generate allowed
Size between MCR steam flow.
5. method according to any of claims 1-4, it is characterised in that: the wear-resisting convection recuperators of multitube at different levels
Between series operation, specifically:
The water at low temperature come out from radiation recuperator (3) is introduced into the wear-resisting convection recuperator of level-one multitube (6a), and fume afterheat will be low
Warm water is heated into saturated water or unsaturated water, and saturated water or unsaturated water enter drum (7), the inner unsaturated water of drum (7) into
Enter the wear-resisting convection recuperator of second level multitube (6b), unsaturated water is heated into saturated water by fume afterheat, and saturated water is back to drum
(7), the saturated vapor that drum (7) generates enters the wear-resisting convection recuperator of three-level multitube (6c), and saturated vapor is through high-temperature flue gas
It is thermally formed superheated steam；And/or
Parallel running between the wear-resisting convection recuperator of multitube at different levels, specifically:
The water at low temperature parallel connection come out from radiation recuperator (3) enters the wear-resisting convection recuperator of multitubes at different levels, and multitubes at different levels are wear-resisting right
Water at low temperature in stream heat exchanger generates steam after high-temperature flue gas heats.
6. method according to any of claims 1-4, it is characterised in that: in step 4), steam is through steam main pipe
(L1) it sends out for users to use.
7. according to the method described in claim 6, it is characterized by: being also connected with external steam pipeline in steam main pipe (L1)
(L2)；External steam is introduced via external steam pipeline (L2), after mixing with the steam in steam main pipe (L1) for users to use.
8. according to the method described in claim 7, it is characterized by: external steam pipeline (L2) introducing is superheated steam.
9. according to the method described in claim 7, it is characterized by: in step 4), on steam main pipe (L1), external steam pipe
Road (L2) is incorporated into the upstream setting the first test point (M1) of steam main pipe (L1)；It is arranged second on external jet chimney (L2)
Test point (M2)；Downstream setting third test point (M3) of steam main pipe (L1) is incorporated into external jet chimney (L2)；First
The steam flow Q of test point (M1) on-line checking corresponding position1With steam enthalpy h1, the second test point (M2) on-line checking pair
Answer the steam flow Q at position2With steam enthalpy h2, the steam flow Q of third test point (M3) on-line checking corresponding position3
With steam enthalpy h3。
10. according to the method described in claim 9, it is characterized by: the fume afterheat resource in flue (5) is constant or increase
When, the steam flow Q in convection recuperator (6) exit1With steam enthalpy h1, can satisfy steam flow Q required for user0
With steam enthalpy h0；
When the fume afterheat resource in flue (5) is reduced, the first test point (M1) detects steam enthalpy by h1It is reduced to h '1When, it supplies
The steam that user uses is regulated and controled by three kinds of control models.
11. according to the method described in claim 10, it is characterized by: the first control model of steam for users to use are as follows:
The steam flow Q required for user provides0With steam enthalpy h0When, the first test point (M1) detects convection recuperator (6) outlet
Place's steam flow is Q1, steam enthalpy is h '1, it is h that the second test point (M2), which detects external steam heat content,2, set the second test point
(M2) steam flow at position is Q2 set, the steam flow at the position third test point (M3) is set as Q3 set；
Both it is equal to after mixing by the sum of convection recuperator (6) included heat of exit steam and the included heat of external steam
Steam total amount of heat can obtain:
Q1×h′1+Q2 set×h2=Q3 set×h0(4),
It is equal to quality of steam after the two mixes with external steam quality sum by convection recuperator (6) exit quality of steam, it can
:
Q3 set=Q1+Q2 set(5),
By formula (4) and (5) to get:
External steam flow Q at this time2 setIt only can guarantee that mixed steam enthalpy is h0, but cannot be guaranteed mixed steam flow
Q3 setIt can satisfy the steam flow Q of user's requirement0；Compare the steam flow Q of user's requirement0It is mixed with obtained in formula (5)
Steam flow Q afterwards3 setSize, further to external steam flow Q2 setCarry out value:
Work as Q0< Q3 setWhen,
Work as Q0> Q3 setWhen, Q2 set=Q0-Q1(8)；
The aperture for adjusting the external steam flow control valve (8) on external steam pipeline (L2), so that external steam pipeline (L2)
Introduced steam flow is Q2 set。
12. according to the method described in claim 10, it is characterized by: second of the control model of steam for users to use are as follows:
The steam enthalpy h required for user only provides0When, close the external steam flow control valve on external steam pipeline (L2)
(8), the first test point (M1) detection convection recuperator (6) exit steam flow is Q1, steam enthalpy is h '1, set to water flow
Amount should be adjusted to Q1 sets, had according to law of conservation of energy:
Q1×h′1=Q1 sets×h0(9),
By formula (9), can obtain:
The aperture for adjusting the water main flow control valve (9) of radiation recuperator (3) inlet, so that into radiation recuperator
(3) feedwater flow is Q1 sets。
13. according to the method described in claim 10, it is characterized by: the third control model of steam for users to use are as follows:
When user only provides steam flow Q required for satisfaction0When, the external steam flow closed on external steam pipeline (L2) is adjusted
Valve (8) guarantees feedwater flow Q1It is constant.
14. according to claim 1-4, method described in any one of 7-13, it is characterised in that: in step 2), the radiation is changed
Hot device (3) is wave-fin pipe radiation recuperator；Wave-fin pipe radiation recuperator includes coiled pipe (301) and is enclosed in snakelike
Manage the helical fin (302) of (301) periphery；And/or
In step 3), several bellows (4) of the sintering machine tail portion are the inverse 1-10 bellows (4) of sintering machine tail portion.
15. according to the method for claim 14, it is characterised in that: in step 3), several bellows of the sintering machine tail portion
It (4) is the inverse 2-8 bellows (4) of sintering machine tail portion.
16. according to the method for claim 15, it is characterised in that: in step 3), several bellows of the sintering machine tail portion
It (4) is the inverse 3-6 bellows (4) of sintering machine tail portion.
17. according to claim 1-4, method described in any one of 7-13,15-16, it is characterised in that: in radiation recuperator
(3) anti-crosswind baffle (10) is additionally provided with around；And/or
Thermal insulation material is laid with outside the corresponding wind box branch pipe (401) of sintering machine tail portion bellows (4) and flue (5).
18. according to claim 1-4, method described in any one of 7-13,15-16, it is characterised in that: be additionally provided with control system
(K)；Control system (K) connects and controls the operation of external steam flow control valve (8), water main flow control valve (9).
19. a kind of device for method described in any one of claim 1-18, which includes sintering machine (A), sintering
Loop (2) are equipped with below the tail portion machine (A), are equipped with multiple bellows (4) below the trolley (1) of sintering machine (A), each bellows (4) are logical
Cross the flue (5) that respective wind box branch pipe (401) is connected to lower part；The device further includes radiation recuperator (3) and heat convection
Device (6), wherein radiation recuperator (3) setting is arranged in the top of loop (2), convection recuperator (6) in the tail portion sintering machine (A)
The corresponding flue (5) of several bellows (4) on, the water out (304) of radiation recuperator (3) is connected to convection recuperator (6)
Entrance；
Wherein: the convection recuperator (6) is the wear-resisting convection recuperator of multi-stage multi-pipe.
20. device according to claim 19, it is characterised in that: the convection recuperator (6) is that 2-5 grades of multitubes are wear-resisting right
Flow heat exchanger.
21. device according to claim 20, it is characterised in that: the convection recuperator (6) is that 3-4 grades of multitubes are wear-resisting right
Flow heat exchanger.
22. device according to claim 20, it is characterised in that: the device further includes drum (7)；Wherein, radiation heat transfer
The water out (304) of device (3) is connected to the first entrance of the wear-resisting convection recuperator of three-level multitube (6c) via first pipe (L3)
(6c01) separates the entrance that second pipe (L4) is connected to the wear-resisting convection recuperator of level-one multitube (6a) from first pipe (L3)
(6a01) separates third pipeline (L5) is connected to the wear-resisting convection recuperator of second level multitube (6b) first from first pipe (L3)
The outlet (6a02) of entrance (6b01), the wear-resisting convection recuperator of level-one multitube (6a) is connected to steam mother via the 4th pipeline (L6)
It manages (L1), the first entrance (701) that the 5th pipeline (L7) is connected to drum (7) is separated from the 4th pipeline (L6), drum (7)
First outlet (702) is connected to the second entrance of the wear-resisting convection recuperator of second level multitube (6b) via drum down-comer (L8)
The outlet (6b02) of (6b03), the wear-resisting convection recuperator of second level multitube (6b) are connected to drum (7) via drum tedge (L9)
Second entrance (703), the 6th pipeline (L10) is separated from drum tedge (L9) and is connected to steam main pipe (L1), drum (7)
Second outlet (704) second entrance of the wear-resisting convection recuperator of three-level multitube (6c) is connected to via the 7th pipeline (L11)
The outlet (6c02) of (6c03), the wear-resisting convection recuperator of three-level multitube (6c) are connected to steam main pipe via the 8th pipeline (L12)
(L1)。
23. device according to claim 22, it is characterised in that: second pipe (L4) is equipped with the wear-resisting convection current of level-one multitube
Heat exchanger flow of inlet water regulating valve (11)；Third pipeline (L5) is equipped with the wear-resisting convection recuperator flow of inlet water of second level multitube and adjusts
Valve (12)；First pipe (L3) is equipped with the wear-resisting convection recuperator flow of inlet water regulating valve (13) of three-level multitube；In the 4th pipeline
(L6) downstream for separating the 5th position pipeline (L7) is equipped with the wear-resisting convection recuperator outlet vapor flow control valve of level-one multitube
(14)；5th pipeline (L7) is equipped with the wear-resisting convection recuperator of level-one multitube to drum Water flow adjusting valve (15)；Drum decline
It manages (L8) and is equipped with drum to the wear-resisting convection recuperator Water flow adjusting valve (16) of second level multitube；It is separated in drum tedge (L9)
The downstream of the 6th position pipeline (L10) is equipped with the wear-resisting convection recuperator of second level multitube to drum Water flow adjusting valve (17)；6th
Pipeline (L10) is equipped with the wear-resisting convection recuperator outlet vapor flow control valve (18) of second level multitube；It is set on 7th pipeline (L11)
There is drum to the wear-resisting convection recuperator steam flow control valve (19) of three-level multitube；8th pipeline (L12) is equipped with three-level multitube
Wear-resisting convection recuperator outlet vapor flow control valve (20).
24. device according to claim 23, it is characterised in that: set in flue (5) position of convection recuperator (6) upstream
Set the 4th test point (M4)；In the flue position in convection recuperator downstream, the 5th test point (M5) is set；At first pipe (L3)
The 6th test point (M6) of upper setting.
25. device described in any one of 9-24 according to claim 1, it is characterised in that: the device further includes water main
(L13), water main (L13) is connected to the entrance (303) of radiation recuperator (3).
26. device according to claim 25, it is characterised in that: be equipped with water main flow on water main (L13)
Regulating valve (9).
27. the device according to any one of claim 22-24, it is characterised in that: be also connected in steam main pipe (L1)
External steam pipeline (L2)；External steam pipeline (L2) is equipped with external steam flow control valve (8).
28. device according to claim 27, it is characterised in that: on steam main pipe (L1), external steam pipeline (L2)
It is incorporated into the upstream setting the first test point (M1) of steam main pipe (L1)；The second test point is set on external jet chimney (L2)
(M2)；Downstream setting third test point (M3) of steam main pipe (L1) is incorporated into external jet chimney (L2).
29. device described in any one of 9-24,26,28 according to claim 1, it is characterised in that: the radiation recuperator (3)
For wave-fin pipe radiation recuperator；Wave-fin pipe radiation recuperator includes coiled pipe (301) and is enclosed in coiled pipe (301)
The helical fin (302) of periphery；And/or
Several bellows (4) of sintering machine (A) tail portion are the inverse 1-10 bellows (4) of sintering machine tail portion.
30. device according to claim 29, it is characterised in that: several bellows (4) of sintering machine (A) tail portion are to burn
Tie the inverse 2-8 bellows (4) of drive end unit.
31. device according to claim 29, it is characterised in that: several bellows (4) of sintering machine (A) tail portion are to burn
Tie the inverse 3-6 bellows (4) of drive end unit.
32. device described in any one of 9-24,26,28,30-31 according to claim 1, it is characterised in that: in radiation heat transfer
Anti- crosswind baffle (10) is additionally provided with around device (3)；And/or
Thermal insulation material is laid with outside the corresponding wind box branch pipe (401) of sintering machine (A) tail portion bellows (4) and flue (5).
33. device according to claim 29, it is characterised in that: be additionally provided with anti-side around radiation recuperator (3)
Windshield plate (10)；And/or
Thermal insulation material is laid with outside the corresponding wind box branch pipe (401) of sintering machine (A) tail portion bellows (4) and flue (5).
34. device described in any one of 9-24,26,28,30-31,33 according to claim 1, it is characterised in that: the device is also
Including control system (K)；Control system (K) connects and controls external steam flow control valve (8), water main flow control valve
(9), the wear-resisting convection recuperator flow of inlet water regulating valve (11) of level-one multitube, the wear-resisting convection recuperator flow of inlet water tune of second level multitube
Save valve (12), the wear-resisting convection recuperator flow of inlet water regulating valve (13) of three-level multitube, the wear-resisting convection recuperator outlet of level-one multitube
Steam flow control valve (14), the wear-resisting convection recuperator of level-one multitube are more to drum Water flow adjusting valve (15), drum to second level
Manage wear-resisting convection recuperator Water flow adjusting valve (16), the wear-resisting convection recuperator of second level multitube to drum Water flow adjusting valve
(17), the wear-resisting convection recuperator outlet vapor flow control valve (18) of second level multitube, drum to the wear-resisting heat convection of three-level multitube
The operation of the wear-resisting convection recuperator outlet vapor flow control valve (20) of device steam flow control valve (19), three-level multitube.
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| CN113146817B (en) * | 2021-03-04 | 2022-12-13 | 贵州迪森元能源科技有限公司 | Automatic control system for residual gas utilization |
| CN115462551B (en) * | 2021-06-10 | 2024-09-03 | 贵州中烟工业有限责任公司 | Tobacco shred moisture regaining machine moisture adjusting device and method and tobacco shred moisture regaining machine |
| CN117556332B (en) * | 2024-01-11 | 2024-03-15 | 北京佰能蓝天科技股份有限公司 | Heating furnace waste heat utilization management method, system and storage medium based on Internet of things |
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| JP2002020813A (en) * | 2000-07-05 | 2002-01-23 | Mitsubishi Heavy Ind Ltd | Apparatus for producing reduced iron |
| CN201621975U (en) * | 2010-03-19 | 2010-11-03 | 湖南永清环保股份有限公司 | Smoke gas waste heat utilization system of draft-fan-free sintering machine |
| CN102914157B (en) * | 2011-08-03 | 2015-05-20 | 山东省冶金设计院股份有限公司 | Method for realizing cold and hot air separation in air bellow of sintering machine and air bellow adopting same |
| CN102435078A (en) * | 2011-12-23 | 2012-05-02 | 孙海祥 | Flue gas residual heat recovering system for large flue of sintering machine |
| CN103673592B (en) * | 2013-12-27 | 2015-08-05 | 中冶长天国际工程有限责任公司 | The method and system of the combustion gas of a kind of preheating, sintering, igniting stove in parallel and combustion air |
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