CN106766950B - A kind of high temperature pelletizing heat recovering device and recovery method - Google Patents
A kind of high temperature pelletizing heat recovering device and recovery method Download PDFInfo
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- CN106766950B CN106766950B CN201611035641.6A CN201611035641A CN106766950B CN 106766950 B CN106766950 B CN 106766950B CN 201611035641 A CN201611035641 A CN 201611035641A CN 106766950 B CN106766950 B CN 106766950B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
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- 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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- Life Sciences & Earth Sciences (AREA)
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- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a kind of high temperature pelletizing heat recovering device and recovery methods, high temperature pellet is carried out Exposure degree using gas in Sealing Arrangement by it, is not consumed water resource, is not also generated dust and pernicious gas, it can either realize the abundant recycling of sensible heat, and have the advantages that energy-saving.
Description
Technical field
The present invention relates to a kind of high temperature pelletizing heat recovering device and recovery methods.
Background technique
Currently, there are many mode of high temperature pelletizing Exposure degree, there are palletizing shaft furnace water-cooled beam Exposure degree technique, pelletizing pot type
Exposure degree technique, closed chain mat machine Exposure degree technique etc..Palletizing shaft furnace water-cooled beam Exposure degree technique is to erect pelletizing
The large and small water beam of furnace becomes Vaporizing cooling mode from the cooling of forced circulation water, and high temperature pellet is made directly to exchange heat with Vaporizing cooling beam,
The internal circulating load of water is reduced, low-pressure steam is produced.But the technique shaft furnace transformation the period it is longer, Vaporizing cooling beam heat exchange efficiency compared with
It is low, can only recovery section pellet sensible heat.Pelletizing pot type Exposure degree technique used for reference in dry coke quenching the structure of coke dry quenching furnace and
Technique is equipped with the equipment such as tank-type heat exchanger, secondary heat exchanger, room temperature deduster and air-introduced machine, after exchanging heat in tank-type heat exchanger
High temperature wind and secondary heat exchanger heat exchange after, the combustion air and heated by gas that rotary kiln or other equipment can be used.But it should
Process requirement carries out secondary heat exchange, secondary heat exchange higher cost, and the exhaust gas temperature after heat exchange is higher, and discharge amount is larger, heat benefit
It is lower with rate, and the tank body lower part is equipped with single discharging device and causes heat transfer effect poor to generate funneling effect.It is closed
Chain mat machine Exposure degree technique is that certain thickness is equipped in insulation cover after wrapping up the existing chain mat machine of pelletizing plant with insulation cover
High thermal conductivity, high-specific surface area honeycomb metal, air is passed through in intensive honeycomb metal, with the high temperature transported on chain mat machine
Pelletizing exchanges heat.The technique input cost is lower, but honeycomb metal windage is larger, needs to configure the air-introduced machine of relatively high power,
And high temperature pellet, when transporting on chain mat machine, the bed of material heat of lower part can not recycle, and Exposure degree rate is lower.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of high temperature pelletizing heat recovering device and recovery method, it will be high
Warm pellet carries out Exposure degree using gas in Sealing Arrangement, does not consume water resource, does not also generate dust and pernicious gas,
It can either realize the abundant recycling of sensible heat, and have the advantages that energy-saving.
The embodiment provides a kind of high temperature pelletizing heat recovering devices, comprising:
Pelletizing heat exchanger, the pelletizing heat exchanger have internal cavities, and be connected to the top of the internal cavities
First feeding inlet, the first discharge port being connected to the bottom of the internal cavities, be connected to the lower part of the internal cavities
One air intake vent and the first air outlet being connected to the top of the internal cavities；
Waste heat boiler, the waste heat boiler have the second air intake vent and the second air outlet；With
High temperature circulation device, the high temperature circulation device include high temperature circulation blower fan, connection first air outlet and the
The high temperature air hose of two air intake vents, the low temperature air hose for being connected to second air outlet and the first air intake vent；
The high temperature circulation blower fan setting is in the low temperature air hose, to drive the low temperature wind exported from second air outlet
Enter the internal cavities from first air intake vent by the low temperature air hose, and drives and export from first air outlet
High temperature wind enters waste heat boiler from second air intake vent by the high temperature air hose；
High temperature pellet is delivered in the internal cavities from the feeding inlet, the internal cavities middle part with from institute
After the low temperature wind progress heat exchange for stating the input of the first air intake vent, from the discharge port output, low temperature wind changes after heat exchange
For high temperature wind, which is changed into low temperature wind after carrying out heat exchange with aqueous medium in the waste heat boiler and described in
The output of second air outlet, the aqueous medium are changed into power steam after carrying out heat exchange and export.
Preferably, further comprise:
Control device, the control device include detecting signal unit and logic control element, the logic control element
Using the temperature of the enthalpy of the power steam of waste heat boiler output and the pellet from first discharge port output as target
Function forms control function, and root as procedure function, based on FUZZY ALGORITHMS FOR CONTROL using the detection signal of the detecting signal unit
The detection signal at the position of the detecting signal unit is adjusted according to the control function.
Preferably, the detecting signal unit includes:
Wind-warm syndrome sensor, wind pressure sensor, air flow sensor, material position in the internal cavities of the pelletizing heat exchanger
Sensor, material temperature sensor；
Positioned at material temperature sensor, the weight sensor of first discharge port；
Wind-warm syndrome sensor, wind pressure sensor, air flow sensor in the high temperature air hose and low temperature air hose；With
Water temperature sensor, hydraulic pressure sensor, water sensor, steam pressure sensor in the waste heat boiler,
Steam temperature sensor, steam flow sensor.
Preferably, further comprise in the internal cavities of the pelletizing heat exchanger:
Multiple high temperature feed bins, the multiple high temperature feed bin are evenly arranged on the top of the internal cavities, each high temperature material side by side
Storehouse is the back taper that bottom is less than top；
Multiple choke tubes, the outlet on the top of each choke tube and a high temperature feed bin, lower part are located at described
The middle part of internal cavities；
Multiple air distribution blast caps, each air distribution blast cap are connected to first air intake vent, by what is inputted from the first air intake vent
Low temperature wind is equably delivered to the middle part of the internal cavities；
The high temperature pellet is inputted from first feeding inlet and is deposited in multiple high temperature feed bins, passes through the choke
Pipe falls to the middle part of the internal cavities, after carrying out heat exchange with the low temperature wind, from first discharge port output.
Preferably, the pelletizing heat exchanger further comprises:
Fast cool air hose, the fast cool air hose are arranged in the outside of the pelletizing heat exchanger, both ends respectively with the inside
The top of cavity is connected to middle part；
The logic control element controls the aperture of the fast cool air hose according to the control function.
Preferably, further comprise:
Automatic distributor, the automatic distributor include: feed chute, selection sliding plate, the second discharge port and third discharging
Mouthful, the feed chute alternatively goes out with described second under the control of the logic control element, through the selection sliding plate
Material mouth or the connection of third discharge port,
The high temperature pellet from second discharge port output to the first feeding inlet of the pelletizing heat exchanger, or from
The third discharge port) output.
Preferably, further comprise:
High temperature elevator, the high temperature elevator are connected between second discharge port and first feeding inlet, with
It exchanges heat under the control of the logic control element, by the high temperature pellet from second discharge port output to the pelletizing
First feeding inlet of device；
The high temperature elevator is hollow cuboid, and outer wall has insulating layer, and having in the cuboid will be described
High temperature pellet is from second discharge port output to the transmission device of the first feeding inlet of the pelletizing heat exchanger, and is located at
The water cooling plant of the transmission device.
Preferably, further comprise:
High temperature wind drainage tube, the high temperature wind drainage tube is by the inside of the high temperature elevator and the pelletizing heat exchanger
The top of internal cavities is connected to,
The logic control element controls the aperture of the high temperature wind drainage tube according to the control function.
Another embodiment of the present invention additionally provides a kind of side using device as described above recycling high temperature pelletizing sensible heat
Method, comprising:
After high temperature pellet is carried out heat exchange with low temperature wind in the pelletizing heat exchanger, it is defeated to be changed into low temperature pellet
The pelletizing heat exchanger out；
The low temperature wind is changed into high temperature wind after carrying out heat exchange in the pelletizing heat exchanger, from the pelletizing heat exchanger
It is input in the waste heat boiler, is changed into low temperature wind after carrying out heat exchange with aqueous medium, the low temperature wind is from the waste heat boiler
Circulation conveying is to the pelletizing heat exchanger；
After the aqueous medium carries out heat exchange in the waste heat boiler, it is changed into power steam and exports.
It preferably, further comprise logic control element, with the enthalpy of the power steam of waste heat boiler output and certainly
The temperature of the pellet of first discharge port output is objective function, using the detection signal of the detecting signal unit as process
Function forms control function based on FUZZY ALGORITHMS FOR CONTROL, and adjusts the position of the detecting signal unit according to the control function
The detection signal at place.
Detailed description of the invention
Only illustratively description and explain the present invention for the following drawings, not delimit the scope of the invention.
Fig. 1 is the structural schematic diagram of high temperature pelletizing heat recovering device of the invention.
Fig. 2 a is the sectional view of the pelletizing heat exchanger in the present invention.
Fig. 2 b is the structural schematic diagram of the pelletizing heat exchanger in the present invention.
Fig. 3 is the structural schematic diagram of the automatic distributor in the present invention.
Fig. 4 is the structural schematic diagram of the high temperature elevator in the present invention.
Specific embodiment
In order to which the technical features, objects and effects of invention are more clearly understood, the Detailed description of the invention present invention is now compareed
Specific embodiment, identical label indicates identical part in the various figures.
Herein, " schematic " expression " serving as examplea, instances, or illustrations " should not will be described herein as " showing
Any diagram, the embodiment of meaning property " are construed to technical solution that is a kind of preferred or more having advantages.
To make simplified form, part related to the present invention is only schematically shown in each figure, and does not represent it
Practical structures as product.In addition, so that simplified form is easy to understand, with the portion of identical structure or function in some figures
Part only symbolically depicts one of those, or has only marked one of those.
As shown in Figure 1, the embodiment provides a kind of high temperature pelletizing heat recovering devices, comprising:
Pelletizing heat exchanger 3, pelletizing heat exchanger 3 have internal cavities, and first be connected to the top of internal cavities enters
Material mouth 31, the first discharge port 32 being connected to the bottom of internal cavities, the first air intake vent 33 being connected to the lower part of internal cavities,
The first air outlet 34 being connected to the top with internal cavities；
Waste heat boiler 6, waste heat boiler 6 have the second air intake vent 61 and the second air outlet 62；
High temperature circulation device, high temperature circulation device include: high temperature circulation blower fan 51, connection the first air outlet 34 and second enter
The high temperature air hose 52 in air port 61, the low temperature air hose 53 for being connected to the second air outlet 62 and the first air intake vent 33, high temperature air hose 52 and low
Pelletizing heat exchanger 3 and waste heat boiler 6 are connected as closed circulation canal by warm air hose 53；
The setting of high temperature circulation blower fan 51 is passed through low in low temperature air hose 53 with the low temperature wind that drive is exported from the second air outlet 62
Warm air hose 53 enters internal cavities from the first air intake vent 33, and the high temperature wind exported from the first air outlet 34 is driven to pass through high temperature wind
Pipe 52 enters waste heat boiler 6 from the second air intake vent 62.Built-up welding or wear-resistant material manufacture can be used in the blade of high temperature circulation blower fan.
High temperature pellet from the internal cavities that feeding inlet 31 is delivered to pelletizing heat exchanger 3, internal cavities middle part with
It after the low temperature wind inputted from the first air intake vent 33 carries out heat exchange, is exported from discharge port 32, low temperature wind changes after heat exchange
For high temperature wind, which is delivered to waste heat boiler 6 by high temperature air hose 52, carries out hot friendship with aqueous medium in waste heat boiler 6
It is changed into low temperature wind after changing and is exported from the second air outlet 62, aqueous medium is changed into power steam and defeated after carrying out heat exchange
Out.
Under practical working situation, from waste heat boiler 6 be discharged low temperature wind temperature be 140 DEG C -180 DEG C, and pass through with
The temperature of high temperature wind after high temperature pellet heat exchange is about 280 DEG C -420 DEG C, is input to the high temperature pellet of pelletizing heat exchanger 3
Temperature be about 500 DEG C -950 DEG C, be about 160 DEG C -220 DEG C by the temperature of low temperature pellet that the first discharge port is discharged.
Waste heat boiler 6 can be Conventional cryogenic low pressure waste heat boiler, be used to carry out high temperature wind and soft water or demineralized water
Heat exchange, to generate the power steam of setting pressure and the degree of superheat.
From the above technical scheme, gas can not only be utilized using gas as heat transferring medium in the present embodiment
Spreading uniform characteristic can be realized abundant heat exchange with high temperature pellet, and setting due to driving gas loopy moving
It is standby --- the cost of high temperature circulation blower fan 51 is relatively low, to realize the purpose of sufficiently recycling sensible heat and energy-saving consumption-reducing.
It further, in the present embodiment, is to be recycled as the gas of heat transferring medium, in pelletizing heat exchanger 3
The interior sensible heat for absorbing high temperature pellet, and under the driving of high temperature circulation blower fan 51, it is delivered to waste heat boiler 6, and in waste heat
Heat exchange is carried out with aqueous medium in boiler 6, the thermal energy absorbed is converted to the shape for the power steam that can be used directly
Formula and export, will absorb thermal energy release after, the gas again under the driving of high temperature circulation blower fan 51, be delivered to pelletizing and change
The sensible heat of high temperature pellet is further absorbed in hot device 3.
Therefore, it using gas as heat transferring medium in the present embodiment, and is incited somebody to action by high temperature air hose 52 and low temperature air hose 53
Pelletizing heat exchanger 3 and waste heat boiler 6 are connected as closed circulation canal, so that recuperated gas is all in the circulation canal along figure
Direction shown in arrow is mobile in 1, and Exposure degree is carried out in closed equipment, does not consume water resource not only, but also do not produce
Fecula dirt and pernicious gas, avoid as recycling sensible heat and caused by secondary pollution to environment.
Preferably, the present embodiment further comprises:
Control device (not shown), control device include detecting signal unit and logic control element, wherein logic
The enthalpy for the power steam with setting pressure and the degree of superheat that control unit is exported with waste heat boiler 6 and from the first discharge port
The temperature of the low temperature pellet of 32 outputs is objective function, is eikonal with the detection signal and control parameter of detecting signal unit
Number forms control function based on FUZZY ALGORITHMS FOR CONTROL, and according to the inspection at the position of the control function adjustment signal detection unit
Signal is surveyed, to realize the maximization of high temperature pelletizing Exposure degree.
Wherein, detecting signal unit can include:
Wind-warm syndrome sensor, wind pressure sensor, air flow sensor, material position in the internal cavities of pelletizing heat exchanger 3 pass
Sensor, material temperature sensor are respectively used to temperature, the pressure of the low temperature wind that detection is input in the internal cavities of pelletizing heat exchanger 3
Power, air quantity, height, the temperature of high temperature pellet etc. being deposited in the internal cavities of pelletizing heat exchanger 3；
Positioned at material temperature sensor, the weight sensor of the first discharge port 32, for detecting the low temperature exported after heat exchange
The temperature and weight of pellet；
Wind-warm syndrome sensor, wind pressure sensor, air flow sensor in high temperature air hose 52 and low temperature air hose 53, difference
For detecting temperature, the pressure, air quantity of the high temperature wind exported after exchanging heat in pelletizing heat exchanger 3, and process in waste heat
Temperature, the pressure, air quantity of the low temperature wind exported after heat exchange in boiler 6；With
Water temperature sensor, hydraulic pressure sensor in waste heat boiler 6, water sensor, steam pressure sensor, steam
Temperature sensor, steam flow sensor are respectively used to detect the temperature in waste heat boiler 6 for the aqueous medium of heat exchange
Degree, pressure, water, and pressure, the temperature, flow of the power steam from the output of waste heat boiler 6.
In the present embodiment, it in order to realize the maximization of the Exposure degree to high temperature pellet, and is filled in view of recycling
The processing speed of the processing capacity set, the recyclable device of the present embodiment is not fixed and invariable, but exported with waste heat boiler 6
The temperature work of the enthalpy of power steam with setting pressure and the degree of superheat and the low temperature pellet exported from the first discharge port 32
To control target, using detecting signal unit signal detected as procedure function, control letter is established based on FUZZY ALGORITHMS FOR CONTROL
Number, and according to the detection signal at the position of the control function adjustment signal detection unit, to realize high temperature pelletizing Exposure degree
Maximization, i.e. the temperature ratio of enthalpy and low temperature pellet is bigger, then more abundant to the Exposure degree of high temperature pellet.
Wherein, the detection signal at the position of adjustment signal detection unit refers to is examined by logic control element adjustment signal
Survey apparatus structure or the speed of service set by unit at position, degree and realize detected to the detecting signal unit
The adjustment of signal.In the present embodiment, control function is to control target, the most with the maximization of high temperature pelletizing Exposure degree with letter
Number function of the detection unit signal detected as variable is established, those skilled in the art's root based on FUZZY ALGORITHMS FOR CONTROL
According to the building principle of FUZZY ALGORITHMS FOR CONTROL, variable parameter can be adjusted according to the actual treatment ability of recyclable device, therefore
It is not where target of the invention based on the specific steps that FUZZY ALGORITHMS FOR CONTROL establishes control function, details are not described herein.
For example, when detecting signal unit detects that the low temperature pellet temperature of the first discharge port 32 output is lower, and pelletizing
When material position inside heat exchanger 3 is lower, then it is determined as the reduction of high temperature pellet yield.At this point, logic control element is according to control
Function will reduce the running frequency of high temperature circulation blower fan 51 or reduce the aperture of the volume damper in low temperature air hose 53, reduce out
The load of material machine improves the wind-warm syndrome in high temperature air hose 52 to increase the heat-exchange time of high temperature pellet, and by detecting
The wind-warm syndrome and air quantity of high temperature wind in high temperature air hose 52, the pressure and the degree of superheat of motivation of adjustment steam guarantee high temperature pelletizing sensible heat
The maximization of recycling.
Alternatively, detect that heat exchanger dump temperature is higher when detecting signal unit, and the material position inside pelletizing heat exchanger 3 compared with
Gao Shi is then determined as that high temperature pellet yield increases.At this point, logic control element will improve the operation frequency of high temperature circulation blower fan 51
Rate or the aperture for increasing the volume damper in low temperature air hose 53, if in the material temperature of the first discharge port 32 output and high temperature air hose 52
High temperature wind wind-warm syndrome in the reasonable scope, then pass through the wind-warm syndrome and air quantity of the high temperature wind that detect, the pressure of motivation of adjustment steam
Power and the degree of superheat guarantee the maximization of high temperature pelletizing Exposure degree.
Further, control device may also include host computer and show and interactive unit, in order to realize human-computer interaction.
Specifically, as shown in Fig. 1 and Fig. 2 a, further comprise in the internal cavities of pelletizing heat exchanger 3:
Multiple high temperature feed bins 35, multiple high temperature feed bins 35 are evenly arranged on the top of internal cavities, each high temperature feed bin 35 side by side
It is less than the back taper at top for bottom；
The top of multiple choke tubes 36, each choke tube 36 is connected to the outlet at bottom of a high temperature feed bin 35, lower portion
In the middle part of internal cavities；
Multiple air distribution blast caps 37, each air distribution blast cap 37 are connected to the first air intake vent 33, will be defeated from the first air intake vent 33
The low temperature wind entered is equably delivered to the middle part of internal cavities；
High temperature pellet is inputted from the first feeding inlet 31 and is deposited in multiple high temperature feed bins 35, is fallen by choke tube 36
To the middle part of internal cavities, with after the middle part of internal cavities and low temperature wind carry out heat exchange, from the of the lower part of internal cavities
The output of one discharge port 32.
Wherein, stainless steel or other heat-resisting materials can be used in high temperature feed bin 35, choke tube 36 and air distribution blast cap 37
Manufacture.The inside of pelletizing heat exchanger 3 is arranged by insulated pouring material or other heat-barrier materials 311, to play thermal insulation function.
In the present embodiment, have the high temperature feed bin 35 there are four laid out in parallel in internal cavities, multiple high temperature feed bins 35
Being uniformly arranged can make high temperature pellet be uniformly distributed in pelletizing heat exchanger 3 and fall from the dispersion of choke tube 36, to avoid
Since accumulation is concentrated and heat transfer effect is influenced, and is realized and being come into full contact with and exchange heat with low temperature wind.
Since the diameter of choke tube 36 is smaller, it is preceding its it is internal be full of high temperature pellet, can prevent external air by
High temperature feed bin 35 enters high temperature feed bin 35 by choke tube 36, so that mixed wind be avoided to make the reduction of high temperature air temperature.
Multiple taper low temperature hoppers 321 can be further set at first discharge port 32, and be arranged in correspondence with low in taper
Multiple vibration discharging machines 322 at the outlet at bottom of warm hopper 321, the low temperature pellet after heat exchange are piled up in taper low temperature hopper
321, the vibration by vibrating discharging machine 322 exports the low temperature pellet in taper low temperature hopper 321 with certain speed.Vibration
Dynamic discharging machine 322 can export low temperature pellet to low temperature conveyer 4, be a conventional chain scraper conveyor, for that will exchange heat
The existing feed bin that low temperature pellet afterwards is delivered to industry spot is stored.
Further, it can further comprise gate valve 323 at the outlet at bottom of each taper low temperature hopper 321, work as vibration
When discharging machine 322 can not work normally, the outlet at bottom of taper low temperature hopper 321 can be closed by gate valve 323.
Preferably, each vibration discharging machine 322 can be installed by track 324 to pelletizing heat exchanger 3, in order in maintenance
Mobile vibration discharging machine 322.
As shown in Figure 2 b, pelletizing heat exchanger 3 further comprises:
The outside of pelletizing heat exchanger 3 is arranged in fast cool air hose 38, fast cool air hose 38, and both ends are upper with internal cavities respectively
Portion is connected to middle part；Logic control element controls the aperture of fast cool air hose 38 according to control function.
In the internal cavities of pelletizing heat exchanger 3, upper part is the accumulation area of high temperature pellet, therefore is high-temperature region,
Middle part is heat transfer zone, and temperature is lower than the temperature in high-temperature region.The top of internal cavities can be connected to by fast cool air hose 38 with middle part, and
And the influence on the top and middle part negative pressure due to air, so that the flow direction of air is from internal empty when fast cool air hose 38 is connected
The top of internal cavities is flowed in the middle part of chamber, to increase air quantity, quickly reduces the temperature of high temperature pellet.Tool in fast cool air hose 38
There is regulating valve 381, logic control element can adjust the aperture of the regulating valve 381 according to control function, exchange heat to realize to pelletizing
The adjustment of wind-warm syndrome and material temperature in the internal cavities of device 3.
For example, when detecting signal unit detects that the dump temperature of pelletizing heat exchanger 3 is higher, and inside pelletizing heat exchanger 3
Material position it is higher when, then be determined as pellet yield increase.At this point, logic control element will improve the fortune of high temperature circulation blower fan 51
Line frequency or the aperture for increasing the volume damper in low temperature air hose 53, if the material temperature and high temperature air hose of the output of the first discharge port 32
When the wind-warm syndrome of high temperature wind in 52 is still higher, then increase the aperture of the regulating valve 381 of fast cool air hose 38, and the height by detecting
The wind-warm syndrome and air quantity of warm wind, the pressure and the degree of superheat of motivation of adjustment steam guarantee the maximization of high temperature pelletizing Exposure degree.
As shown in figures 1 and 3, the recyclable device of the present embodiment further comprises:
Automatic distributor 1, automatic distributor 1 include: feed chute 11, selection sliding plate 12, the second discharge port 13 and third
Discharge port 14, feed chute 11 under the control of logic control element, by selection sliding plate 12 alternatively with the second discharge port 13
Or third discharge port 14 is connected to,
High temperature pellet exports to the first feeding inlet 31 of pelletizing heat exchanger 3 from the second discharge port 13, or goes out from third
The output of material mouth 14 is stored to live former chain mat machine with being sent into live feed bin.
Specifically, it as shown in figure 3, selection sliding plate 12 can be positioned below driving device 121, is used in logic control list
Under the control of member, selection sliding plate 12 is pushed to be connected to the second discharge port 13 or third discharge port 14, which can
For Electrohydraulic push rod or electric pushrod etc..
For example, selecting sliding plate 12 to be connected to the second discharge port 13 under normal operating conditions.When detecting signal unit detects
Dump temperature to pelletizing heat exchanger 3 is higher, and when the material position inside pelletizing heat exchanger 3 is higher, is then determined as pellet yield
Increase.At this point, logic control element by improve high temperature circulation blower fan 51 running frequency or increase low temperature air hose 53 in air quantity
The aperture of regulating valve then passes through control lubricating substance if the material temperature of the first discharge port 32 output is still higher, and when high temperature wind wind-warm syndrome is lower
Plate 12 is connected to third discharge port 14, part high temperature pellet is gone to live former chain mat machine by automatic distributor 1.And lead to
The wind-warm syndrome and air quantity of the high temperature wind detected are crossed, the pressure and the degree of superheat of motivation of adjustment steam guarantee high temperature pelletizing Exposure degree
Maximization.
Preferably, as shown in Figure 1 and Figure 4, the recyclable device of the present embodiment further comprises:
High temperature elevator 2, high temperature elevator 2 is connected between the second discharge port 13 and the first feeding inlet 31, in logic
It exports under the control of control unit, by high temperature pellet from the second discharge port 13 to the first feeding inlet 31 of pelletizing heat exchanger 3；
High temperature elevator 2 is closed hollow cuboid, and outer wall has insulating layer, has in cuboid by high temperature ball
Nodulizing is exported from the second discharge port 13 to the transmission device 21 of the first feeding inlet 31 of pelletizing heat exchanger 3, and is located at transmission dress
Set the water cooling plant (not shown) in 21.Insulating layer can be manufactured by asbestos or other heat-barrier materials, for playing heat-insulation and heat-preservation
Effect and increase the recuperation of heat amount of recyclable device.
Hopper inside high temperature elevator 2 is manufactured using stainless steel or other heat-resisting materials.Positioned at transmission device 21
Interior water cooling plant is used to reduce operating temperature for transmission device, to improve the reliability of transmission device.
Preferably, high temperature elevator 2 further comprises:
High temperature wind drainage tube 22, high temperature wind drainage tube 22 are empty by the inside of high temperature elevator 2 and the inside of pelletizing heat exchanger 3
The top of chamber is connected to, and logic control element controls the aperture of high temperature wind drainage tube 22 according to control function.
Since high temperature elevator 2 is closed equipment, it is internal also due to the accumulation of high temperature pellet and increase temperature,
In order to utilize this partial heat, can be delivered in internal cavities by high temperature wind drainage tube 22, and reduce high temperature elevator 2
Internal temperature, to increase the recuperation of heat amount of recyclable device and improve the operational reliability of high temperature elevator 2.High temperature wind drainage tube
22 aperture can be adjusted by logic control element according to the currently processed situation of recyclable device.
In another embodiment of the invention, it additionally provides a kind of using device as described above recycling high temperature pelletizing sensible heat
Method, comprising:
After high temperature pellet is carried out heat exchange with low temperature wind in pelletizing heat exchanger 3, it is changed into the output of low temperature pellet
Pelletizing heat exchanger 3；
Low temperature wind is changed into high temperature wind after carrying out heat exchange in pelletizing heat exchanger 3, is input to waste heat from pelletizing heat exchanger 3
In boiler 6, it is changed into low temperature wind after carrying out heat exchange with aqueous medium, which changes from 6 circulation conveying of waste heat boiler to pelletizing
Hot device 3；
After aqueous medium carries out heat exchange in waste heat boiler 6, it is changed into power steam and exports.
It preferably, further comprise logic control element, the enthalpy of the power steam exported with waste heat boiler 6 and from first
Discharge port 32 export pellet temperature be objective function, using the detection signal of detecting signal unit as procedure function, be based on
FUZZY ALGORITHMS FOR CONTROL forms control function, and according to the detection signal at the position of the control function adjustment signal detection unit.
From the above technical scheme, gas can not only be utilized using gas as heat transferring medium in the present embodiment
Spreading uniform characteristic can be realized abundant heat exchange with high temperature pellet, and setting due to driving gas loopy moving
It is standby --- the cost of high temperature circulation blower fan 51 is relatively low, to realize the purpose of sufficiently recycling sensible heat and energy-saving consumption-reducing.
It further, in the present embodiment, is to be recycled as the gas of heat transferring medium, in pelletizing heat exchanger 3
The interior sensible heat for absorbing high temperature pellet, and under the driving of high temperature circulation blower fan 51, it is delivered to waste heat boiler 6, and in waste heat
Heat exchange is carried out with aqueous medium in boiler 6, the thermal energy absorbed is converted to the shape for the power steam that can be used directly
Formula and export, will absorb thermal energy release after, the gas again under the driving of high temperature circulation blower fan 51, be delivered to pelletizing and change
The sensible heat of high temperature pellet is further absorbed in hot device 3.
Therefore, it using gas as heat transferring medium in the present embodiment, and is incited somebody to action by high temperature air hose 52 and low temperature air hose 53
Pelletizing heat exchanger 3 and waste heat boiler 6 are connected as closed circulation canal, so that recuperated gas is all in the circulation canal along figure
Direction shown in arrow is mobile in 1, and Exposure degree is carried out in closed equipment, does not consume water resource not only, but also do not produce
Fecula dirt and pernicious gas, avoid as recycling sensible heat and caused by secondary pollution to environment.
In the present embodiment, it in order to realize the maximization of the Exposure degree to high temperature pellet, and is filled in view of recycling
The processing speed of the processing capacity set, the recyclable device of the present embodiment is not fixed and invariable, but exported with waste heat boiler 6
The temperature work of the enthalpy of power steam with setting pressure and the degree of superheat and the low temperature pellet exported from the first discharge port 32
To control target, using detecting signal unit signal detected as procedure function, control letter is established based on FUZZY ALGORITHMS FOR CONTROL
Number, and according to the detection signal at the position of the control function adjustment signal detection unit, to realize high temperature pelletizing Exposure degree
Maximization, i.e. the temperature ratio of enthalpy and low temperature pellet is bigger, then more abundant to the Exposure degree of high temperature pellet.
Herein, " first ", " second " etc. are only used for mutual differentiation, rather than indicate significance level and sequence and
Existing premise etc. each other.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope that is bright, and being not intended to limit the invention, it is all without departing from equivalent embodiments made by technical spirit of the present invention or
Change, such as the combination, segmentation or repetition of feature, should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of high temperature pelletizing heat recovering device characterized by comprising
Pelletizing heat exchanger (3), the pelletizing heat exchanger (3) has internal cavities, and is connected to the top of the internal cavities
The first feeding inlet (31), be connected to the bottom of the internal cavities the first discharge port (32), with the internal cavities under
The first air intake vent (33) of portion's connection and the first air outlet (34) being connected to the top of the internal cavities；The pelletizing changes
Hot device (3) includes fast cool air hose (38), and the fast cool air hose setting is in the outside of the pelletizing heat exchanger (3), both ends difference
It is connected to the top of the internal cavities and middle part；
Waste heat boiler (6), the waste heat boiler (6) have the second air intake vent (61) and the second air outlet (62)；With
High temperature circulation device (5), the high temperature circulation device (5) include high temperature circulation blower fan (51), connection first outlet air
Mouthful (34) and the high temperature air hose (52) of the second air intake vent (61) are connected to second air outlet (62) and the first air intake vent (33)
Low temperature air hose (53)；
The high temperature circulation blower fan (51) setting in low temperature air hose (53), with drive exported from second air outlet (62) it is low
Warm wind enters the internal cavities from first air intake vent (33) by the low temperature air hose (53), and drives from described first
The high temperature wind of air outlet (34) output enters waste heat boiler from second air intake vent (62) by the high temperature air hose (52)
(6)；
High temperature pellet is delivered in the internal cavities from the feeding inlet (31), the internal cavities middle part with from institute
After the low temperature wind progress heat exchange for stating the first air intake vent (33) input, exported from first discharge port (32), low temperature wind passes through
It is changed into high temperature wind after heat exchange, which is changed into low after the interior progress heat exchange with aqueous medium of the waste heat boiler (6)
It Wen Feng and is exported from second air outlet (62), the aqueous medium is changed into power steam after carrying out heat exchange and exports.
2. high temperature pelletizing heat recovering device as described in claim 1, which is characterized in that further comprise:
Control device, the control device include detecting signal unit and logic control element, and the logic control element is with institute
The temperature of the enthalpy and the pellet from first discharge port (32) output of stating the power steam of waste heat boiler (6) output is mesh
Scalar functions form control function as procedure function, based on FUZZY ALGORITHMS FOR CONTROL using the detection signal of the detecting signal unit, and
The detection signal at the position of the detecting signal unit is adjusted according to the control function.
3. high temperature pelletizing heat recovering device as claimed in claim 2, which is characterized in that the detecting signal unit includes:
Wind-warm syndrome sensor, wind pressure sensor, air flow sensor, material position in the internal cavities of the pelletizing heat exchanger (3)
Sensor, material temperature sensor；
Positioned at material temperature sensor, the weight sensor of first discharge port (32)；
Wind-warm syndrome sensor, wind pressure sensor, air flow sensor in the high temperature air hose (52) and low temperature air hose (53)；With
Water temperature sensor, hydraulic pressure sensor in the waste heat boiler (6), water sensor, steam pressure sensor, steaming
Stripping temperature sensor, steam flow sensor.
4. high temperature pelletizing heat recovering device as claimed in claim 2, which is characterized in that the pelletizing heat exchanger (3) it is interior
Further comprise in portion's cavity:
Multiple high temperature feed bins (35), the multiple high temperature feed bin (35) are evenly arranged on the top of the internal cavities, Mei Gegao side by side
Warm feed bin (35) is the back taper that bottom is less than top；
Multiple choke tubes (36), the outlet on the top of each choke tube (36) and a high temperature feed bin (35), lower part
Positioned at the middle part of the internal cavities；
Multiple air distribution blast caps (37), each air distribution blast cap (37) are connected to first air intake vent (33), will be from the first inlet air
The low temperature wind of mouth (33) input is equably delivered to the middle part of the internal cavities；
The high temperature pellet is inputted from first feeding inlet (31) and is deposited in multiple high temperature feed bins (35), by described
Choke tube (36) falls to the middle part of the internal cavities, after carrying out heat exchange with the low temperature wind, from first discharging
Mouth (32) output.
5. high temperature pelletizing heat recovering device as claimed in claim 2, which is characterized in that
The logic control element controls the aperture of the fast cool air hose (38) according to the control function.
6. high temperature pelletizing heat recovering device as claimed in claim 2, which is characterized in that further comprise:
Automatic distributor (1), the automatic distributor (1) include: feed chute (11), selection sliding plate (12), the second discharge port
(13) it is slided under the control of the logic control element, through the selection with third discharge port (14), the feed chute (11)
Flitch (12) is alternatively connected to second discharge port (13) or third discharge port (14),
The high temperature pellet is exported from second discharge port (13) to the first feeding inlet of the pelletizing heat exchanger (3)
(31), it or from the third discharge port (14) exports.
7. high temperature pelletizing heat recovering device as claimed in claim 6, which is characterized in that further comprise:
High temperature elevator (2), the high temperature elevator (2) are connected to second discharge port (13) and first feeding inlet
(31) between, under the control of the logic control element, the high temperature pellet is defeated from second discharge port (13)
Out to the first feeding inlet (31) of the pelletizing heat exchanger (3)；
The high temperature elevator (2) is hollow cuboid, and outer wall has insulating layer, has in the cuboid by the height
Warm pellet is exported from second discharge port (13) to the transmission device of the first feeding inlet (31) of the pelletizing heat exchanger (3)
(21), and be located at the transmission device (21) water cooling plant.
8. high temperature pelletizing heat recovering device as claimed in claim 7, which is characterized in that further comprise:
High temperature wind drainage tube (22), the high temperature wind drainage tube (22) is by the inside of the high temperature elevator (2) and the pelletizing
The top of the internal cavities of heat exchanger (3) is connected to,
The logic control element controls the aperture of the high temperature wind drainage tube (22) according to the control function.
9. a kind of method using device as described in claim 1 recycling high temperature pelletizing sensible heat characterized by comprising
After high temperature pellet is carried out heat exchange with low temperature wind in the pelletizing heat exchanger (3), it is defeated to be changed into low temperature pellet
The pelletizing heat exchanger (3) out；
The low temperature wind is changed into high temperature wind after carrying out heat exchange in the pelletizing heat exchanger (3), from the pelletizing heat exchanger
(3) it is input in the waste heat boiler (6), is changed into low temperature wind after carrying out heat exchange with aqueous medium, the low temperature wind is from described remaining
Heat boiler (6) circulation conveying is to the pelletizing heat exchanger (3)；
After the aqueous medium carries out heat exchange in the waste heat boiler (6), it is changed into power steam and exports.
10. according to the method described in claim 9, it is characterized in that, further comprising logic control element and signal detection list
Member, the enthalpy of the power steam exported with the waste heat boiler (6) and the pellet from first discharge port (32) output
Temperature be objective function, using the detection signal of the detecting signal unit as procedure function, based on FUZZY ALGORITHMS FOR CONTROL formed control
Function processed, and adjust according to the control function detection signal at the position of the detecting signal unit.
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| CN201611035641.6A CN106766950B (en) | 2016-11-23 | 2016-11-23 | A kind of high temperature pelletizing heat recovering device and recovery method |
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| CN201611035641.6A CN106766950B (en) | 2016-11-23 | 2016-11-23 | A kind of high temperature pelletizing heat recovering device and recovery method |
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| CN106766950B true CN106766950B (en) | 2019-03-29 |
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|---|---|---|---|---|
| JP2007284761A (en) * | 2006-04-18 | 2007-11-01 | Nippon Steel Corp | Apparatus and method for recovering heat from molten slag in blast furnace |
| CN102620572A (en) * | 2012-04-16 | 2012-08-01 | 北京世纪源博科技股份有限公司 | Ferroalloy mine heat furnace system with waste heat power generation system |
| CN202465830U (en) * | 2011-12-26 | 2012-10-03 | 济南钢铁股份有限公司 | Residual heat reclaiming system for pellets and sintered ores |
| CN205014851U (en) * | 2015-09-28 | 2016-02-03 | 宝钢工程技术集团有限公司 | Sintering deposit shows heat reclamation device |
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2016
- 2016-11-23 CN CN201611035641.6A patent/CN106766950B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007284761A (en) * | 2006-04-18 | 2007-11-01 | Nippon Steel Corp | Apparatus and method for recovering heat from molten slag in blast furnace |
| CN202465830U (en) * | 2011-12-26 | 2012-10-03 | 济南钢铁股份有限公司 | Residual heat reclaiming system for pellets and sintered ores |
| CN102620572A (en) * | 2012-04-16 | 2012-08-01 | 北京世纪源博科技股份有限公司 | Ferroalloy mine heat furnace system with waste heat power generation system |
| CN205014851U (en) * | 2015-09-28 | 2016-02-03 | 宝钢工程技术集团有限公司 | Sintering deposit shows heat reclamation device |
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