CN106702143B - A kind of warm-air supply method of energy-efficient belt type roasting machine - Google Patents
A kind of warm-air supply method of energy-efficient belt type roasting machine Download PDFInfo
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- CN106702143B CN106702143B CN201710012705.9A CN201710012705A CN106702143B CN 106702143 B CN106702143 B CN 106702143B CN 201710012705 A CN201710012705 A CN 201710012705A CN 106702143 B CN106702143 B CN 106702143B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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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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Abstract
A kind of warm-air supply method of energy-efficient belt type roasting machine, belongs to pellet production technical field.The method includes：Belt type roasting machine is divided into eight regions, is followed successively by forced air drying area, exhausting dry section, preheating zone, roast area, soaking zone, a cooling area, cooling 2nd area and cooling 3rd area；Preheating zone is divided into two sections of preheated one-section and preheating, roast area is divided into four sections of one section of roasting, two sections of roasting, three sections of roasting and roasting；The hot waste gas of one section of generation of two sections of preheating and roasting is delivered to a cooling area；The hot waste gas of two sections of generations of roasting is delivered to exhausting dry section；It is delivered to main exhauster after the hot waste gas of three sections of generations of roasting is pooled to heat exchanger heat exchange；The hot waste gas that four sections of roasting and soaking zone generate is delivered to preheating zone.The flow and temperature level of hot waste gas needed for the Temperature Distribution for the hot waste gas that the present invention is generated according to each region and each region carry out rational Distribution utilization to hot waste gas, reduce the outer discharge capacity of hot waste gas.
Description
Technical field
The present invention relates to pellet production technical field, more particularly to the hot wind of a kind of energy-efficient belt type roasting machine supplies
To method.
Background technology
Pelletizing ore production technology is being added after fine grinding fine iron breeze or the addition a small amount of additive mixing of other iron content powders
Under conditions of water wetting, by pelletizer rolling balling, drying, preheating, roasting, soaking and cooling, being consolidated into has
The ball-type iron-bearing material of some strength and metallurgical performance.
Green-ball made of mostly being rolled at present to pelletizer using belt type roasting machine is dried, preheated, roasted, equal hot and cold
But, current belt type roasting machine is divided into seven regions, respectively forced air drying area, exhausting dry section, preheating zone, roast area,
Hot-zone, a cooling area and cooling 2nd area.A cooling area and cooling 2nd area share a cooling blower, using 25 DEG C of air to cold
But the pelletizing in an area and cooling 2nd area is cooled down, and the hot waste gas of cooling 2nd area discharge is sent by wind turbine and conveyance conduit to air blast
Dry section；The hot waste gas of cooling area discharge is sent by burning machine upper cover to soaking zone, roast area and preheating zone；Roast area generates
A part of hot waste gas and soaking zone generate whole hot waste gas then sent to exhausting dry section and preheating zone by a Fans,
In, the heat of exhausting dry section all is from the hot waste gas of roast area and soaking zone, and the heat of preheating zone is fired essentially from fuel
It burns, the hot waste gas of roast area and soaking zone mainly generates preheating zone the effect of concurrent heating, and the combustion of preheating zone consumption is reduced with this
Doses.
The existing technology has at least the following problems：On the one hand, the distribution length due to roast area on belt type roasting machine compared with
It is long, therefore the hot waste gas that roast area generates is more, and the distribution length of exhausting dry section and preheating zone is shorter, therefore, exhausting is dry
Hot waste gas needed for dry area and preheating zone is also less, and the hot waste gas amount that entire roast area and soaking zone generate is more than exhausting dry section
With the hot waste gas amount needed for preheating zone, so the hot waste gas conveying that the hot waste gas for only generating roast area back segment and soaking zone generate
To exhausting dry section and preheating zone, most of hot waste gas of the leading portion of roast area and stage casing generation is directly discharged into air, meanwhile, in advance
Whole hot waste gas that hot-zone generates also are directly discharged into air, not only waste a large amount of heat energies, while also polluted environment；It is another
Aspect, since the hot waste gas of roast area back segment and soaking zone generation is to be conveyed to exhausting dry section and preheating by a Fans
Area, therefore the temperature for being conveyed to exhausting dry section and the hot waste gas of preheating zone is identical, but exhausting dry section and preheating zone institute
The temperature of the hot waste gas needed is different, and the temperature of the hot waste gas needed for exhausting dry section is 350 DEG C, to be less than needed for preheating zone
Hot waste gas temperature, the temperature for the hot waste gas that roast area back segment and soaking zone generate takes out at 700 DEG C or so, therefore in order to meet
The demand of wind dry section, needs to be blended into a large amount of cold wind to 700 DEG C or so of the hot waste gas that wind turbine collects and reaches 350 DEG C or so
After be conveyed to exhausting dry section and preheating zone, cause the waste of heat.
Invention content
In order to solve the big portion of whole hot waste gas and roast area leading portion, stage casing that preheating zone existing in the prior art generates
Energy waste and environmental pollution caused by point hot waste gas is directly discharged into air and wind turbine is converged from roast area back segment and soaking zone
Caused by exhausting dry section and preheating zone being conveyed to after 700 DEG C of the hot waste gas cooling that collection gets up the problem of energy waste, this hair
It is bright to provide a kind of warm-air supply method of energy-efficient belt type roasting machine, the method includes：
Belt type roasting machine is divided into eight regions, according to stream traffic direction be followed successively by forced air drying area, exhausting dry section,
Preheating zone, roast area, soaking zone, a cooling area, cooling 2nd area and cooling 3rd area；
Preheating zone is divided into two sections of preheated one-section and preheating, the temperature of two sections of preheating is higher than the temperature of preheated one-section,
Roast area is divided into four sections of one section of roasting, two sections of roasting, three sections of roasting and roasting, one section of roasting, two sections of roasting, roasting three
Section and the temperature of four sections of roasting gradually rise；
The hot waste gas of one section of generation of two sections of preheating and roasting is collected and by the first wind turbine and the first conveyance conduit
It is delivered to a cooling area；
The hot waste gas of two sections of generations of roasting is delivered to exhausting dry section by the second wind turbine and the second conveyance conduit；
The hot waste gas of three sections of generations of roasting is pooled to heat exchanger, main exhauster is delivered to after heat exchanger exchanges heat；
The hot waste gas that four sections of roasting and soaking zone generate is collected and defeated by third wind turbine and third conveyance conduit
It send to preheating zone；
Wherein, the temperature range of the hot waste gas of two sections of generations is preheated at 300~400 DEG C, roasts the hot waste gas of one section of generation
Temperature range at 400~450 DEG C, roast two sections generation hot waste gas temperature range at 450~500 DEG C, roast three sections production
The temperature range of raw hot waste gas is at 500~600 DEG C, and the temperature range of the hot waste gas of four sections of roasting and soaking zone generation is 600
~700 DEG C.
Burning gases are conveyed into the heat exchanger, the burning gases are the mixed gas of combustion gas and combustion air, to
Air, the burning gases and sky being delivered in the hot waste gas heat exchanging device of three sections of roasting in heat exchanger are conveyed in the heat exchanger
Gas is delivered to the main exhauster after being preheated；
Burning gases after preheating are delivered to the preheating zone and the roast area respectively, when detecting belt roasting
When the oxygen content of machine is relatively low, the air after preheating is delivered to the preheating zone and the roast area respectively.
The heat exchanger include three output channels, respectively the first combustion gas pipe, the second combustion gas pipe and
Air pipeline；
First combustion gas pipe is connected with the preheating zone, for the burning gases after preheating to be delivered to the preheating
Area；
Second combustion gas pipe is connected with the roast area, for the burning gases after preheating to be delivered to the roasting
Area；
Air pipeline is connected with the preheating zone and the roast area respectively, for the air after preheating to be delivered to respectively
The preheating zone and the roast area.
The method further includes：
The hot waste gas that one area of the cooling generates is delivered to the soaking by the belt type roasting machine upper cover in a cooling area
Area；
The hot waste gas that 2nd area of the cooling generates is delivered to the preheating by the belt type roasting machine upper cover in cooling 2nd area
Area and the roast area；
The hot waste gas that 3rd area of the cooling generates is delivered to air blower by the 4th conveyance conduit, is conveyed by air blower
To the forced air drying area.
The temperature range for the hot waste gas that one area of the cooling generates is at 1000~1100 DEG C, heat that 2nd area of the cooling generates
The temperature range of exhaust gas is at 700~900 DEG C, and the temperature range for the hot waste gas that 3rd area of the cooling generates is at 200~350 DEG C.
The method further includes that hot air duct is converted in setting first；
The hot waste gas that four sections of the roasting and the soaking zone generate first is collected to the 5th conveyance conduit, then by described
Third wind turbine and the third conveyance conduit are delivered to the preheating zone；
Described first one end for converting hot air duct is connected to the 5th conveyance conduit, the other end and the 4th delivery pipe
Road is connected to；
First, which converts hot air duct, is equipped with valve.
The method further include on the 4th conveyance conduit setting first convert cold blast sliding valve, convert cold blast sliding valve and open when first
When, it is blended into cold air into the 4th conveyance conduit, the hot waste gas conveyed in the 4th conveyance conduit is cooled down.
The method further includes that hot air duct is converted in setting second；
Second one end for converting hot air duct is connected to second conveyance conduit, the other end and the forced air drying area and stove
The 6th conveyance conduit connection between cover wind turbine.
The method further includes that second is arranged on the transmission pipeline before the import of the main exhauster to convert cold blast sliding valve, when
Second convert cold blast sliding valve open when, to the import of the main exhauster before transmission pipeline in be blended into cold air, to the main exhausting
Hot waste gas cools down in transmission pipeline before the import of machine.
The method further includes that third is arranged on second conveyance conduit to convert cold blast sliding valve, when the third converts cold blast sliding valve
When opening, it is blended into cold air into second conveyance conduit, the hot waste gas in second conveyance conduit is cooled down.
In embodiments of the present invention, the profiling temperatures according to belt type roasting machine during the work time, belt is roasted
Machine is divided into eight regions, and the normal work of profiling temperatures and each region of the hot waste gas generated according to each region
The flow and temperature level of required hot waste gas when making, two sections are divided by preheating zone, roast area are divided into four sections, and will be pre-
The hot waste gas of one section of generation of two sections of heat and roasting is conveyed to a cooling area, and the hot waste gas of two sections of generations of roasting, which is delivered to exhausting, to be done
The hot waste gas of three sections of generations of roasting is pooled to the heat that heat exchanger carries out heat exchange and generates four sections of roasting and soaking zone by dry area
Exhaust gas is delivered to preheating zone, and most of hot waste gas relative to the existing whole hot waste gas for generating preheating zone and roast area is complete
Portion is discharged for air, greatly reduces preheating zone and roast area and is directly discharged into the hot waste gas amount of air, meanwhile, relative to existing
One Fans of use simultaneously provided for hot waste gas for exhausting dry section and preheating zone, the present invention according to exhausting dry section and in advance
The temperature of hot waste gas needed for hot-zone, is individually for exhausting dry section and preheating zone provides hot waste gas, has more reasonably used heat
The energy；Roasting three sections generation hot waste gas burning gases and air can be preheated by heat exchanger, make burning gases and
Air is transmitted further to preheating zone and roast area after preheating and burns, and is efficiently using the hot waste gas of three sections of generations of roasting
The consumption that burning gases can also be saved while heat, has saved the energy；Simultaneously as using two sections of preheating and roasting one
The hot waste gas that section generates cools down the pelletizing in a cooling area, avoids due to extremely cold and is produced to the pellet strength in a cooling area
Raw the phenomenon that destroying, while the temperature of the hot waste gas of cooling area generation is also higher so that the temperature of the hot waste gas in a cooling area
Be closer to the temperature of the pelletizing of soaking zone, compared with the existing technology for, the hot waste gas in one area of cooling in the present invention can
Preferably to be kept the temperature to the pelletizing of soaking zone, the intensity of pelletizing is improved.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of warm-air supply schematic diagram of energy-efficient belt type roasting machine provided in an embodiment of the present invention.
Wherein,
1 forced air drying area；2 exhausting dry sections；
3 preheating zones, 31 preheated one-sections, 32 two sections of preheatings；
4 roast areas, 41 one section of roastings, 42 two sections of roastings, 43 three sections of roastings, 44 four sections of roastings；
5 soaking zones；6 one area of cooling；7 2nd area of cooling；8 3rd area of cooling；
9 first wind turbines；10 first conveyance conduits；11 second wind turbines；12 second conveyance conduits；13 heat exchangers；14 main exhausting
Machine；15 third wind turbines；16 third conveyance conduits；17 cooling blowers；18 the 5th conveyance conduits；The belt type roasting machine in 19 one area of cooling
Upper cover；The belt type roasting machine upper cover in 20 2nd area of cooling；21 the 4th conveyance conduits；22 air blowers；23 first convert hot air duct；24
One converts cold blast sliding valve；25 the 6th conveyance conduits；26 bonnet wind turbines；27 second convert hot air duct；28 second convert cold blast sliding valve；29 thirds are converted
Cold blast sliding valve；
The first combustion gas pipes of A；The second combustion gas pipes of B；C air pipelines.
Specific implementation mode
In order to solve the big portion of whole hot waste gas and roast area leading portion, stage casing that preheating zone existing in the prior art generates
Energy waste and environmental pollution caused by point hot waste gas is directly discharged into air and wind turbine is converged from roast area back segment and soaking zone
Caused by exhausting dry section and preheating zone being conveyed to after 700 DEG C of the hot waste gas cooling that collection gets up the problem of energy waste, this hair
Bright embodiment provides a kind of warm-air supply method of energy-efficient belt type roasting machine, and this method includes：
As shown in Figure 1, belt type roasting machine is divided into eight regions, according to stream traffic direction be followed successively by forced air drying area 1,
Exhausting dry section 2, preheating zone 3, roast area 4, soaking zone 5, a cooling area 6, cooling two areas 7 and cooling three areas 8；
Preheating zone 3 is divided into two section 32 of preheated one-section 31 and preheating, the temperature that two section 32 of preheating is higher than preheated one-section
Roast area 4 is divided into four section 44 of one section 41 of roasting, two section 42 of roasting, three section 43 of roasting and roasting, roasting one by 31 temperature
Section 41, the temperature for roasting two section 42, roasting three section 43 and roasting four section 44 gradually rise；
The hot waste gas of one section of 41 generation of two section 32 of preheating and roasting is collected and is conveyed by the first wind turbine 9 and first
Pipeline 10 is delivered to a cooling area 6；
The hot waste gas of two section of 42 generation of roasting is delivered to exhausting drying by the second wind turbine 11 and the second conveyance conduit 12
Area 2；
The hot waste gas of three section of 43 generation of roasting is pooled to heat exchanger 13, main exhausting is delivered to after the heat exchange of heat exchanger 13
Machine 14；
The hot waste gas that four section 44 of roasting and soaking zone 5 generate is collected and by third wind turbine 15 and third delivery pipe
Road 16 is delivered to preheating zone 3, wherein the hot waste gas of four section 44 of roasting and the generation of soaking zone 5 is conveyed to the whole region of preheating zone 3
It is utilized, i.e., is conveyed to preheated one-section 31 simultaneously and preheating is utilized for two section 32；
The temperature range of the hot waste gas of two section of 32 generation of preheating roasts the hot waste gas of one section of 41 generation at 300~400 DEG C
Temperature range roasts the temperature range of the hot waste gas of two section of 42 generation at 450~500 DEG C, roasts three section 43 at 400~450 DEG C
The temperature range of the hot waste gas of generation is at 500~600 DEG C, the temperature range of the hot waste gas of four section 44 of roasting and the generation of soaking zone 5
At 600~700 DEG C.
In the process of work, there is certain length in each region to belt type roasting machine, the different location in each region
Locate, the temperature of generated hot waste gas is also different in reaction process, therefore, in embodiments of the present invention, according to each area
Required hot waste gas when the profiling temperatures of the hot waste gas generated at different location in domain and each region work normally
The region is reasonably divided into corresponding hop count, then different sections of hot waste gas is carried out rational profit by flow and temperature level
With.
In the embodiment of the present invention, in the length range of preheating zone 3, the temperature of the hot waste gas of a certain section of generation is in 300
Between~400 DEG C, in the length range of roast area 4, according to stream traffic direction, the temperature of roast area 4 gradually rises,
The temperature of leading portion in roast area 4, the hot waste gas of generation is between 400~450 DEG C, and temperature is between 300~450 DEG C
Hot waste gas can be used for cooling down the pelletizing in a cooling area 6, therefore it is two sections that can be divided to preheating zone 3, will be in preheating zone 3
The temperature of the hot waste gas of generation is in the part between 300~400 DEG C and is used as two section 32 of preheating, will the interior heat generated in roast area 4
The temperature of exhaust gas is in the part between 400~450 DEG C as one section 41 of roasting, has corresponding bellows to the section at each section
The hot waste gas of generation is collected, therefore can be by the hot waste gas that the bellows for preheating two section 32 are collected and the bellows for roasting one section 41
The hot waste gas of collection collects, and is delivered to a cooling area 6 by the first wind turbine 9 and the first conveyance conduit 10, i.e., with 300~
450 DEG C of hot waste gas cools down the pelletizing in a cooling area 6, and the pelletizing temperature in a cooling area 6 is existing generally at 1300 DEG C or more
Have in technology, belt type roasting machine there are two cooling zone, a cooling area and cooling 2nd area use a cooling blower, cold by this
But wind turbine is carried out cooling using the pelletizing of 25 DEG C of 1000 DEG C of air pair or more, due to excessive temperature differentials, it may appear that due to extremely cold
And the phenomenon that making the intensity of pelletizing substantially reduce, and in the present invention, there are three cooling zone, a cooling areas 6 to use for belt type roasting machine
300~450 DEG C of hot waste gas cools down pelletizing, reduces the temperature difference, and pelletizing is avoided to generate strength reduction due to extremely cold
Phenomenon increases the intensity of pelletizing, after pelletizing carries out tentatively cooling in a cooling area 6, then transports to cooling two area 7 and cooling three
Area 8, cooling two area 7 and cooling three areas 8 share a cooling blower 17；Meanwhile the heat that two section 32 of will preheating and roast one section 41
Exhaust gas is recycled, rather than is directly discharged into air, has saved the energy, reduces the pollution to environment；
In roast area 4, since temperature gradually rises, within the scope of one section of 41 certain length being connected of roasting, produce
The temperature of raw hot waste gas is between 450~500 DEG C, and required temperature when carrying out exhausting cooling to the pelletizing of exhausting dry section 2
Degree can carry out exhausting drying using the hot waste gas for being in the temperature range generally at 350 DEG C or so to pelletizing, can incite somebody to action
The temperature of the hot waste gas generated in roast area 4 is in the part between 450~500 DEG C as two section 42 of roasting, by the wind of this section
The hot waste gas that machine is collected is conveyed to exhausting dry section 2 by the second wind turbine 11 and the second conveyance conduit 12, is to adopt in the prior art
It is delivered to exhausting dry section 1 with 700 DEG C of hot waste gas, but since the temperature of the hot waste gas will be significantly larger than 1 institute of exhausting dry section
The temperature of the hot waste gas needed, therefore the hot waste gas for 700 DEG C is also needed to be blended into a large amount of cold wind, and the embodiment of the present invention can use roasting
The hot waste gas burnt two section 42 carries out exhausting drying to the pelletizing of exhausting dry section 2, and during transmission, temperature has hot waste gas
Declined, if the temperature of hot waste gas is still higher than the temperature needed for exhausting dry section 2, is blended into a small amount of cold wind, phase
Conventionally, reasonably the hot waste gas of two section of 42 generation of roasting is utilized, rather than is directly discharged into air, saved
About the energy reduces the pollution to environment simultaneously；
In roast area 4, within the scope of two section of 42 residue length being connected of roasting, the temperature of the hot waste gas of generation is 500
Between~700 DEG C, and the hot waste gas in wherein 600~700 DEG C of temperature ranges can be used for carrying out in advance the pelletizing in preheating zone 3
Heat, therefore the part that the temperature of the hot waste gas generated in roast area 4 is between 500~700 DEG C can be further subdivided into two sections,
Wherein, the temperature range of the hot waste gas of generation is in the part between 500~600 DEG C as three section 43 of roasting, and the heat of generation is useless
The temperature range of gas is in the part between 600~700 DEG C as four section 44 of roasting, uses the hot waste gas of four section of 44 generation of roasting
That 4 back segment of roast area and soaking zone 5 are generated to by a Fans pelletizing progress concurrent heating of preheating zone 3 in the prior art
Hot waste gas is conveyed to exhausting dry section 2 and preheating zone 3, therefore is conveyed to the temperature of exhausting dry section 2 and the hot waste gas of preheating zone 3
It is identical, but the temperature of the hot waste gas needed for exhausting dry section 2 and preheating zone 3 is different, the heat needed for exhausting dry section 2
The temperature of exhaust gas is 350 DEG C, to be less than the temperature of the hot waste gas needed for preheating zone 3, what 4 back segment of roast area and soaking zone 5 generated
The temperature of hot waste gas needs the 700 DEG C of left sides collected to wind turbine at 700 DEG C or so, therefore in order to meet the needs of exhausting dry section 2
Right hot waste gas, which is blended into after a large amount of cold wind reach 350 DEG C or so, is conveyed to exhausting dry section 2 and preheating zone 3, wastes heat
Amount, meanwhile, when the hot waste gas using 350 DEG C or so carries out concurrent heating to the pelletizing of preheating zone 3, the temperature of hot waste gas still compared with
It is low so that hot waste gas supplement it is still less to the heat of preheating zone 3, therefore also need using fuel combustion generate heat to preheating
The pelletizing in area 3 carries out concurrent heating, and in the embodiment of the present invention, the temperature for the hot waste gas for being conveyed to preheating zone 3 is improved, therefore increase
Supplement can reduce the consumption of fuel to the heat of preheating zone 3；And the temperature for roasting three section 43 of hot waste gas is also higher,
If the waste of the energy can be caused by being directly discharged into air, therefore can the hot waste gas of three section of 43 generation of roasting be pooled to heat exchanger
13, it exchanges heat in heat exchanger 13, the heatrejection after heat exchange can reduce, and be delivered to main exhauster 14 again at this time and be discharged into greatly
Gas, compared with the existing technology for, in roast area 4, the hot waste gas that is discharged into air be only roast three section of 43 generation heat it is useless
Gas, the hot waste gas generated in the prior art with only 4 back segment of roast area, remaining whole is discharged into air, therefore reduces
The outer discharge capacity of hot waste gas, and then reduce the treating capacity of the desulphurization system of hot waste gas, saves a construction investment, saved at
This, while the pollution to environment is reduced, and it is carried out before the hot waste gas of three section of 43 generation of roasting is discharged into air
Heat exchange, takes full advantage of the heat energy of hot waste gas；
In embodiments of the present invention, the temperature range for the hot waste gas that soaking zone 5 generates is also between 600~700 DEG C,
It can be used for preheating the pelletizing of preheating zone 3, as shown in Figure 1, the heat that therefore bellows for roasting four section 44 can be collected
The hot waste gas that exhaust gas and the bellows of soaking zone 5 are collected is collected to the 5th conveyance conduit 18, and defeated by third wind turbine 15 and third
Pipeline 16 is sent to be delivered to preheating zone 3.
In the course of work of belt type roasting machine, in the whole length range of preheating zone 3 and the whole length model of roast area 4
Burner is all distributed in enclosing, burning gases, which are distributed to preheating zone 3 and roast area 4, by burner burns, burning gases one
As be combustion gas and combustion air mixed gas, be at this time the mode of flameless combustion, wherein combustion gas can be coke-stove gas, help
Combustion gas body is air, and in embodiments of the present invention, the burning gases that can will distribute to preheating zone 3 and roast area 4 are defeated in advance
It send to heat exchanger 13, since three section 43 of hot waste gas of roasting is also pooled in heat exchanger 13, the heat that three section 43 of roasting is useless
Gas can be preheated with the burning gases in heat exchanging device 13, then the burning gases after preheating are delivered to 3 He of preheating zone respectively
Roast area 4 requires to reach roasting in the course of work of belt type roasting machine, needs to maintain certain ignition temperature, if
The combustion gas higher calorific value of burning gases is relatively low, then cannot be satisfied roasting and require, it is therefore desirable to is higher using combustion gas higher calorific value
Burning gases, and the cost of the higher burning gases of combustion gas higher calorific value is also higher, but in embodiments of the present invention, by combustion
It burns gas to be preheated, mainly the combustion air in burning gases is preheated, improves the temperature of combustion air, because
The effect for improving the temperature of combustion air is better than the effect for the temperature for improving combustion gas, can so improve the theory of burning gases
Ignition temperature, roasting requirement can be met by making the lower burning gases of combustion gas higher calorific value also, reduce purchase gas cost, meanwhile,
When reaching identical ignition temperature, by being preheated to burning gases, the volume of used burning gases, drop can be reduced
The low consumption of burning gases, has saved the energy；
In embodiments of the present invention, the oxygen of ferrous oxide is completed in order to ensure to have in belt type roasting machine enough oxygen
Change, air can also be conveyed into heat exchanger 13, the air in the hot waste gas heat exchanging device 13 of three section 43 of roasting is made to be preheated,
When detecting that the oxygen content of belt type roasting machine is relatively low, by the air delivery after preheating to preheating zone 3 and roast area 4.
In embodiments of the present invention, as shown in Figure 1, three output channels can be arranged for heat exchanger 13, respectively first
Combustion gas pipe A, the second combustion gas pipe B and air pipeline C；
First combustion gas pipe A is connected with preheating zone 3, for the burning gases after preheating to be delivered to preheating zone 3；
Second combustion gas pipe B is connected with roast area 4, for the burning gases after preheating to be delivered to roast area 4；
Air pipeline C is connected with preheating zone 3 and roast area 4 respectively, for the air after preheating to be delivered to preheating respectively
Area 3 and roast area 4.
As shown in Figure 1, in embodiments of the present invention, the hot waste gas that can also generate a cooling area 6 passes through a cooling area 6
Belt type roasting machine upper cover 19 be delivered to soaking zone 5；
The hot waste gas that cooling two areas 7 generate is delivered to 3 He of preheating zone by the belt type roasting machine upper cover 20 in cooling two areas 7
Roast area 4, wherein the whole region that the hot waste gas that cooling two areas 7 generate is conveyed to preheating zone 3 is utilized, i.e., conveys simultaneously
It is utilized for two section 32 to preheated one-section 31 and preheating, the hot waste gas that cooling two areas 7 generate also is conveyed to the entire area of roast area 4
Domain is utilized, i.e., is conveyed to one area 41 of roasting, two areas 42 of roasting, three areas 43 of roasting and four areas 44 of roasting simultaneously and is utilized；
The hot waste gas that cooling three areas 8 generate is delivered to air blower 22 by the 4th conveyance conduit 21, passes through air blower 22
It is delivered to forced air drying area 1.
In the belt type roasting machine course of work, the temperature to the pelletizing in a cooling area 6 is transported generally at 1300 DEG C or so,
It is the hot waste gas using the temperature range of one section of 41 generation of two section 32 of preheating and roasting at 300~450 DEG C in the embodiment of the present invention
The pelletizing in a cooling area 6 is cooled down, and is cold to the pelletizing progress in a cooling area using 25 DEG C of air in the prior art
But, the temperature for the hot waste gas that one area 6 of cooling therefore in the embodiment of the present invention generates is higher than cools down an area 6 production in the prior art
Raw temperature, the temperature range for the hot waste gas that one area 6 of cooling in the embodiment of the present invention generates are existing at 1000~1100 DEG C or so
There is the temperature in one area 6 of cooling in technology at 800 DEG C or so, in the prior art, 800 DEG C or so of the heat that a cooling area is generated
Exhaust gas is delivered to soaking zone 5 and is kept the temperature to the pelletizing in soaking zone 5, but the pelletizing temperature in soaking zone 5 is above 800 DEG C
, therefore, the pelletizing of soaking zone 5 cannot be kept the temperature well in the prior art so that the intensity of the pelletizing of soaking zone 5 compared with
It is low, especially it is located at the pelletizing of 5 bottom of soaking zone, but in embodiments of the present invention, the hot waste gas generated due to a cooling area 6
Temperature is higher, is closer to the temperature of the pelletizing of soaking zone 5, therefore can be very good to generate heat preservation to the pelletizing of soaking zone 5
Effect, makes the pelletizing of soaking zone 5 effectively carry out lattice growth in insulating process, improves the intensity of pelletizing；
In embodiments of the present invention, pelletizing continues forwards transportation, mistake of the pelletizing in transport after the cooling in one area 6 of supercooling
Cheng Zhong, temperature can also be declined, and according to Temperature Distribution feature, subdivided can be gone out cool down two areas 7 and cooling three areas 8, cooling
The temperature for the hot waste gas that two areas 7 generate is higher than the temperature for the hot waste gas that cooling three areas 8 generate, the hot waste gas that cooling two areas 7 generate
Temperature range generally at 700~900 DEG C, can by the belt type roasting machine upper cover 19 in cooling two areas 7 will cooling two areas 7 heat
Exhaust gas is delivered to preheating zone 3 and roast area 4, simultaneously as the length of soaking zone 5 is shorter, the hot waste gas needed for soaking zone 5 also compared with
It is few, therefore the extra hot waste gas of cooling one section of generation can enter the belt type roasting machine upper cover 19 in cooling two areas 7, by cold
But the belt type roasting machine upper cover 19 in two areas 7 is delivered to preheating zone 3 and roast area 4, is the reaction process of preheating zone 3 and roast area 4
Heat is provided；
The temperature range for the hot waste gas that cooling three areas 8 generate locates heat within this temperature range generally at 200~350 DEG C
Exhaust gas can be used for carrying out forced air drying to the pelletizing in forced air drying area 1, and therefore, the hot waste gas that cooling three areas 8 generate can lead to
It crosses the 4th conveyance conduit 21 and is delivered to forced air drying area 1.
In embodiments of the present invention, the Temperature Distribution hot spot of the hot waste gas generated according to the cooling segment of belt type roasting machine,
Be three regions by the cooling segment of belt type roasting machine, i.e., a cooling area 6, cooling two areas 7 and cooling three areas 8, wherein cooling one
Cooling gas used in area 6 is to preheat the hot waste gas of two section 32 and one section of 41 generation of roasting, and generate using a cooling area 6
Hot waste gas is used for keeping the temperature soaking zone 5, while the hot waste gas that cooling two areas 7 generate can be used for preheating zone 3 and roasting
The reaction in area 4 provides heat, and the pelletizing in forced air drying area 1 can be dried in the hot waste gas of the generation in cooling three areas 8, relatively
It is cooled down for an area and the cooling two area regions Liang Ge in being in the prior art only divided into cooling segment, on the one hand, reasonably make
With the hot waste gas two section 32 of preheating and roast one section 41, reduce the outer discharge capacity of the hot waste gas of entire belt type roasting machine, saves
The energy reduces pollution simultaneously；On the other hand, since the temperature range for preheating two section 32 and the hot waste gas for roasting one section 41 is
300~450 DEG C, therefore, carrying out cooling to the pelletizing in a cooling area 6 using the hot waste gas can prevent due to extremely cold and to pelletizing
Internal structure generates the phenomenon that destruction, increases the intensity of pelletizing；Another aspect, the temperature for the hot waste gas that a cooling area 6 generates
It is higher, preferably the pelletizing of soaking zone 5 can be kept the temperature, it is more rational by the way that cooling segment is divided into three regions
The hot waste gas of different temperatures is used.
When being in cold winter, extraneous temperature is relatively low, therefore, passes through the in the hot waste gas that cooling three areas 8 generate
, may be relatively low due to ambient temperature during four conveyance conduits 21 are conveyed to air blower 22, and make the 4th conveyance conduit 21
There is the phenomenon that temperature reduction in transmission process in interior hot waste gas, so that the hot waste gas in the 4th conveyance conduit 21 is discontented
Therefore the phenomenon that demand of sufficient forced air drying, can be arranged first and convert hot air duct 23, first convert one end of hot air duct 23 with
5th conveyance conduit 18 is connected to, and the other end is connected to the 4th conveyance conduit 21, and is converted first and valve is arranged on hot air duct 23
Door, due to roasting four section 44 and soaking zone 5 generate hot waste gas temperature range at 600~700 DEG C, be higher than the 4th delivery pipe
Therefore the temperature of hot waste gas in road 21 is unsatisfactory for rousing if detecting that the temperature of the hot waste gas in the 4th conveyance conduit 21 is relatively low
When air-drying dry demand, valve can be opened, the high temperature hot waste gas in the 5th conveyance conduit 18 can convert hot wind by first at this time
Pipeline 23 enters the 4th conveyance conduit 21 so that the temperature of the hot waste gas in the 4th conveyance conduit 21 increases, and waits for the 4th delivery pipe
When the temperature of hot waste gas in road 21 meets forced air drying demand, the valve that can be converted first on hot air duct 23 is closed.
In embodiments of the present invention, first can also be arranged on the 4th conveyance conduit 21 and converts cold blast sliding valve 24, if practical roasting
It, can be with if temperature of the temperature for the hot waste gas that cooling three areas 8 generate higher than the hot waste gas needed for blasting drying period during burning
It opens first and converts cold blast sliding valve 24, cold air is blended into the 4th conveyance conduit 21, the hot waste gas in the 4th conveyance conduit 21 is carried out
It cools until meeting forced air drying requirement.
As shown in Figure 1, the hot waste gas that the 4th conveyance conduit 21 transmits is delivered to forced air drying area 1 by air blower 22,
Forced air drying is carried out to the pelletizing in forced air drying area 1, the hot waste gas after forced air drying is conveyed to by the 6th conveyance conduit 25
Bonnet wind turbine 26, when the temperature of the hot waste gas after forced air drying is less than 100 DEG C, the water content of hot waste gas is higher, heat at this time
Exhaust gas easily corrodes the 6th conveyance conduit 25 and bonnet wind turbine 26, so, second can be arranged and convert hot air duct 27, second converts
One end of hot air duct 27 is connected to the second conveyance conduit 12, and the other end is connected to the 6th conveyance conduit 25, due to two sections of roasting
The temperature range of 42 hot waste gas generated is higher than the temperature of the hot waste gas in the 6th conveyance conduit 25 at 450~500 DEG C, because
This, the high temperature hot waste gas in the second conveyance conduit 12 can convert hot air duct 27 by second and enter the 6th conveyance conduit 25 so that
The temperature of hot waste gas in 6th conveyance conduit 25 is higher than dew-point temperature, reduces the aqueous of the hot waste gas in the 6th conveyance conduit 25
Amount, greatly reduces the corrosion rate of the 6th conveyance conduit 25 and bonnet wind turbine 26.
As shown in Figure 1, in embodiments of the present invention, the hot waste gas that three section 43 of roasting passes through master after the heat exchange of heat exchanger 13
Exhaust fan 14 is discharged into air, and the hot waste gas that exhausting dry section 2 and preheated one-section 31 generate can also be collected to heat exchanger 13 and master
Transmission pipeline between exhaust fan 14, and then air is emitted by main exhauster 14, heatrejection is higher right in order to prevent
The internal structure of main exhauster 14 has an adverse effect, and can be arranged on the transmission pipeline before the import of main exhauster 14
Two convert cold blast sliding valve 28, can open second and convert cold blast sliding valve 28, to the import of main exhauster 14 before transmission pipeline in be blended into it is cold
Gas is transmitted further to main exhausting after being cooled down to the hot waste gas transmitted in the transmission pipeline before the import of main exhauster 14
Machine 14, in the prior art, the higher internal structure to main exhauster of heatrejection has an adverse effect in order to prevent, can adopt
With the main shaft wind turbine that the quality of materials of internal structure is more excellent, therefore cost is higher, and uses method in the present invention can be with
The requirement to the material quality of 14 internal structure of main exhauster is reduced, cost is reduced.
As shown in Figure 1, in embodiments of the present invention, third can also be arranged on the second conveyance conduit 12 and convert cold blast sliding valve
29, it can choose whether that opening third converts cold blast sliding valve 29 according to actual conditions, if the temperature of the hot waste gas of two section of 42 generation of roasting
When higher than temperature needed for exhausting dry section 1, third can be opened and convert cold blast sliding valve 29, be blended into the second conveyance conduit 12 cold
Gas cools down the hot waste gas in the second conveyance conduit 12 until meeting exhausting drying condition.
In embodiments of the present invention, the profiling temperatures according to belt type roasting machine during the work time, belt is roasted
Machine is divided into eight regions, and the normal work of profiling temperatures and each region of the hot waste gas generated according to each region
The flow and temperature level of required hot waste gas when making, two sections are divided by preheating zone 3, roast area 4 are divided into four sections, and will
The hot waste gas of one section of 41 generation of two section 32 of preheating and roasting is conveyed to a cooling area 6, and the hot waste gas of two section of 42 generation of roasting is defeated
It send to exhausting dry section 2, the hot waste gas of three section of 43 generation of roasting, which is pooled to heat exchanger 13, to carry out exchanging heat and roasting four sections
44 and the hot waste gas that generates of soaking zone 5 be delivered to preheating zone 3, relative to the existing whole hot waste gas for generating preheating zone 3 and
Most of hot waste gas of roast area 4 all for discharge air, greatly reduces preheating zone 3 and roast area 4 and is directly discharged into air
Hot waste gas amount, meanwhile, provide hot waste gas simultaneously for exhausting dry section 2 and preheating zone 3 using a Fans relative to existing
For, the temperature of hot waste gas of the present invention needed for exhausting dry section 2 and preheating zone 3 is individually for exhausting dry section 2 and preheating
Area 3 provides hot waste gas, has more reasonably used heat energy；The hot waste gas of three section of 43 generation of roasting can be right by heat exchanger 13
Burning gases and air are preheated, and so that burning gases and air is transmitted further to preheating zone 3 and roast area 4 after preheating and are carried out
Burning can also save the consumption of burning gases while efficiently using the heat of hot waste gas of three section of 43 generation of roasting,
The energy is saved；Simultaneously as using one section of 41 generation of two section 32 of preheating and roasting hot waste gas to the pelletizing in a cooling area 6 into
Row cooling, avoids due to extremely cold and generates the phenomenon that destroying to the pellet strength in a cooling area 6, while a cooling area 6 generates
Hot waste gas temperature it is also higher so that the temperature of hot waste gas in a cooling area 6 more connects with the temperature of the pelletizing of soaking zone 5
Closely, for compared with the existing technology, the present invention in one area 6 of cooling hot waste gas can preferably to the pelletizing of soaking zone 5 into
Row heat preservation, improves the intensity of pelletizing.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of warm-air supply method of energy-efficient belt type roasting machine, which is characterized in that the method includes：
Belt type roasting machine is divided into eight regions, forced air drying area, exhausting dry section, preheating are followed successively by according to stream traffic direction
Area, roast area, soaking zone, a cooling area, cooling 2nd area and cooling 3rd area；
Preheating zone is divided into two sections of preheated one-section and preheating, the temperature of two sections of preheating is higher than the temperature of preheated one-section, will roast
Burn area be divided into roasting one section, roasting two sections, roasting three sections and roasting four sections, roasting one section, roasting two sections, roasting three sections and
The temperature of four sections of roasting gradually rises；
The hot waste gas of one section of generation of two sections of preheating and roasting is collected and is conveyed by the first wind turbine and the first conveyance conduit
To a cooling area；
The hot waste gas of two sections of generations of roasting is delivered to exhausting dry section by the second wind turbine and the second conveyance conduit；
The hot waste gas of three sections of generations of roasting is pooled to heat exchanger, main exhauster is delivered to after heat exchanger exchanges heat；
The hot waste gas that four sections of roasting and soaking zone generate is collected and is delivered to by third wind turbine and third conveyance conduit
Preheating zone；
Wherein, the temperature range of the hot waste gas of two sections of generations is preheated at 300 ~ 400 DEG C, roasts the temperature of the hot waste gas of one section of generation
Range roasts the temperature range of the hot waste gas of two sections of generations at 450 ~ 500 DEG C at 400 ~ 450 DEG C, and the heat for roasting three sections of generations is useless
The temperature range of gas is at 500 ~ 600 DEG C, and the temperature range of the hot waste gas of four sections of roasting and soaking zone generation is at 600 ~ 700 DEG C；
The hot waste gas that one area of the cooling generates is delivered to the soaking zone by the belt type roasting machine upper cover in a cooling area；
By hot waste gas that 2nd area of the cooling generates by the belt type roasting machine upper cover in cooling 2nd area be delivered to the preheating zone and
The roast area；
The hot waste gas that 3rd area of the cooling generates is delivered to air blower by the 4th conveyance conduit, institute is delivered to by air blower
State forced air drying area；
The method further includes that first is arranged on the 4th conveyance conduit to convert cold blast sliding valve, when first, which converts cold blast sliding valve, opens,
It is blended into cold air into the 4th conveyance conduit, the hot waste gas conveyed in the 4th conveyance conduit is cooled down.
2. the warm-air supply method of energy-efficient belt type roasting machine according to claim 1, which is characterized in that described
Burning gases are conveyed in heat exchanger, the burning gases are the mixed gas of combustion gas and combustion air, defeated into the heat exchanger
Air is sent, the burning gases and air in the hot waste gas heat exchanging device of three sections of the roasting being delivered in heat exchanger are defeated after being preheated
It send to the main exhauster；
Burning gases after preheating are delivered to the preheating zone and the roast area respectively, when detecting the belt type roasting machine
When oxygen content is relatively low, the air after preheating is delivered to the preheating zone and the roast area respectively.
3. the warm-air supply method of energy-efficient belt type roasting machine according to claim 2, which is characterized in that described to change
Hot device includes three output channels, respectively the first combustion gas pipe, the second combustion gas pipe and air pipeline；
First combustion gas pipe is connected with the preheating zone, for the burning gases after preheating to be delivered to the preheating zone；
Second combustion gas pipe is connected with the roast area, for the burning gases after preheating to be delivered to the roast area；
Air pipeline is connected with the preheating zone and the roast area respectively, described for the air after preheating to be delivered to respectively
Preheating zone and the roast area.
4. the warm-air supply method of energy-efficient belt type roasting machine according to claim 1, which is characterized in that described cold
But the temperature range for the hot waste gas that an area generates is at 1000 ~ 1100 DEG C, the temperature range for the hot waste gas that 2nd area of the cooling generates
At 700 ~ 900 DEG C, the temperature range for the hot waste gas that 3rd area of the cooling generates is at 200 ~ 350 DEG C.
5. the warm-air supply method of energy-efficient belt type roasting machine according to claim 1, which is characterized in that the side
Method further includes that hot air duct is converted in setting first；
The hot waste gas that four sections of the roasting and the soaking zone generate first is collected to the 5th conveyance conduit, then passes through the third
Wind turbine and the third conveyance conduit are delivered to the preheating zone；
Described first one end for converting hot air duct is connected to the 5th conveyance conduit, and the other end connects with the 4th conveyance conduit
It is logical；
First, which converts hot air duct, is equipped with valve.
6. the warm-air supply method of the energy-efficient belt type roasting machine according to any one of claim 1 to 5 claim,
It is characterized in that, the method, which further includes setting second, converts hot air duct；
Second one end for converting hot air duct is connected to second conveyance conduit, the other end and the forced air drying area and bonnet wind
The 6th conveyance conduit connection between machine.
7. the warm-air supply method of the energy-efficient belt type roasting machine according to any one of claim 1 to 5 claim,
It is characterized in that, the method further includes that second is arranged on the transmission pipeline before the import of the main exhauster to convert cold wind
Valve, when second convert cold blast sliding valve open when, to the import of the main exhauster before transmission pipeline in be blended into cold air, to the master
The hot waste gas in transmission pipeline before the import of exhaust fan cools down.
8. the warm-air supply method of the energy-efficient belt type roasting machine according to any one of claim 1 to 5 claim,
It is characterized in that, the method further include on second conveyance conduit be arranged third convert cold blast sliding valve, when the third convert it is cold
When air-valve is opened, it is blended into cold air into second conveyance conduit, the hot waste gas in second conveyance conduit is cooled down
Cooling.
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| CN107120963A (en) * | 2017-07-11 | 2017-09-01 | 中冶北方（大连）工程技术有限公司 | Belt type roasting machine is cooled down and backheat wind system and its method |
| CN108342567B (en) * | 2018-04-18 | 2023-07-25 | 中南大学 | Test pellet belt roasting machine |
| CN110484713B (en) * | 2019-09-05 | 2021-02-19 | 首钢集团有限公司 | Method and device for producing pellet ore |
| CN110671931A (en) * | 2019-11-01 | 2020-01-10 | 中冶北方（大连）工程技术有限公司 | System and method for recycling hot waste gas of rotary hearth furnace |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004332001A (en) * | 2003-04-30 | 2004-11-25 | Jp Steel Plantech Co | Method and equipment for manufacturing sintered ore |
| CN101624647A (en) * | 2009-08-04 | 2010-01-13 | 武汉钢铁(集团)公司 | Pellet roasting production technology recycling residual heat and system thereof |
| CN102168922A (en) * | 2011-03-11 | 2011-08-31 | 东北大学 | Device and method for efficiently recovering and utilizing waste heat resources in sintering process |
| CN105274323A (en) * | 2014-06-16 | 2016-01-27 | Posco公司 | Burning apparatus and manufacturing method of reduced iron |
-
2017
- 2017-01-09 CN CN201710012705.9A patent/CN106702143B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004332001A (en) * | 2003-04-30 | 2004-11-25 | Jp Steel Plantech Co | Method and equipment for manufacturing sintered ore |
| CN101624647A (en) * | 2009-08-04 | 2010-01-13 | 武汉钢铁(集团)公司 | Pellet roasting production technology recycling residual heat and system thereof |
| CN102168922A (en) * | 2011-03-11 | 2011-08-31 | 东北大学 | Device and method for efficiently recovering and utilizing waste heat resources in sintering process |
| CN105274323A (en) * | 2014-06-16 | 2016-01-27 | Posco公司 | Burning apparatus and manufacturing method of reduced iron |
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