CN101650127B - Blast device, grate and pellet preparation device - Google Patents
Blast device, grate and pellet preparation device Download PDFInfo
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- CN101650127B CN101650127B CN2009101485282A CN200910148528A CN101650127B CN 101650127 B CN101650127 B CN 101650127B CN 2009101485282 A CN2009101485282 A CN 2009101485282A CN 200910148528 A CN200910148528 A CN 200910148528A CN 101650127 B CN101650127 B CN 101650127B
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Abstract
The invention provides a blast device which is arranged in a grate. The blast device comprises a first blast pipeline and a gas distribution device, wherein the first blast pipeline is communicated with a hot blast source, the gas distribution device is arranged under a grate bed of the grate and is communicated with the first blast pipeline, and the gas distribution device comprises a plurality of ventilation parts with upward ventilation directions. Compared with the prior art, hot blast which comes from the hot blast source can be sufficiently mixed with low-temperature gas which passes through a material layer under the grate bed, the temperature of mixed gas can be increased above an acid dew point of the mixed gas by controlling the blast volume of the hot blast source to prevent dew, and therefore, the corrosion of the grate bed of the grate, a supporting roller for supporting the grate, a blast box and other parts can be avoided. The invention also relates to the grate and a pellet preparation device.
Description
Technical field
The present invention relates to prepare the device of pellet, be specifically related to a kind of air-supply arrangement and drying grate.
Background technology
Pellet is one of primary raw material of blast furnace ironmaking and DRI.Compare with sintering deposit, pellet has multiple advantage.For example, the mechanical strength of pellet when cold conditions is higher than sintering deposit, therefore is difficult for broken and cracking when transportation, loading and unloading and storage, consumes and lacks, and the powder of generation is few, helps improving the gas permeability of blast furnace stock column, and gas stream in the stove is evenly distributed.In the prior art, the method for preparing pellet mainly contains three kinds, is respectively: shaft furnace is produced the pelletizing method, and belt type roasting machine prepares the pelletizing method, the grate kiln legal system is equipped with the pelletizing method.Compare with other two kinds of methods, the grate kiln method has that good product quality, unit production capacity are big, rotary kiln can be with the coal heat supply, be applicable to and obtained the multiple advantage of large-scale production using widely.
See also Fig. 1, for employing grate kiln technology of the prior art prepares the pellet schematic representation of apparatus.As shown in Figure 1, described device comprises the drying grate 11 of preheating green pellets, the rotary kiln 12 that the pelletizing after the drying grate preheating is passed through in roasting, the cooler 13 that the pelletizing of rotary kiln baking is passed through in cooling.Described drying grate 11 is divided into the first dryer section DD1, the second dryer section DD2, transition preheating section TPH, preheating section PH successively from infeed end one side.Cooler is divided into the first cooling section C1, the second cooling section C2, the 3rd cooling section C3 successively from infeed end one side.The flue gas of discharging from the first cooling section C1 of cooler is admitted to rotary kiln pelletizing is carried out roasting, and the flue gas of discharging from rotary kiln is admitted to preheating section PH pelletizing is carried out preheating; The flue gas that the second cooling section C2 discharges is admitted to transition preheating section TPH; The flue gas that the 3rd cooling section C3 discharges is admitted to first dryer section pelletizing is carried out first order drying.
Be connected with the first air supply duct 11a between the exhaust end of preheating section PH and second dryer section, by this first air supply duct 11a, the flue gas of discharging from preheating section is admitted to second dryer section pelletizing is carried out drying.
In rotary kiln and preheating section PH, pelletizing generation desulphurization reaction, therefore from the flue gas that preheating section is discharged, contain some sulphur, when sulfur-containing smoke gas in second dryer section, pass the bed of material with the pelletizing drying after, flue-gas temperature generally has only 100 ℃～130 ℃, be lower than acid dew point, produce acid mist, can corrode tail gas treatment devices such as follow-up electric cleaner 14, air exhausting device 15.
In order to prevent that tail gas treatment device is subjected to the corrosion of acid mist, in the prior art, be provided with flue gas by-pass line 11c between the discharge duct 11b of the 11a and second dryer section from first pipeline.Please be the cutaway view of the DD2 section among Fig. 1 simultaneously referring to Fig. 2, the bed of material 101 is placed on the bed 102 of combing, and the carrying roller group 103 that supports the bed of combing is arranged below the bed 102 of combing.By described flue gas by-pass line 11c, the discharge duct 11b that the flue gas that a part is discharged from preheating section is sent to second dryer section mixes with the flue gas of discharging from second dryer section, thereby flue-gas temperature is brought up to more than the acid dew point of flue gas, prevent to form acid mist, avoid corroding follow-up tail gas treatment device.
The shortcoming of prior art is, though the flue-gas temperature of discharging from second dryer section can have been brought up to more than the acid dew point, can avoid forming acid mist, but when passing the bed of material of second dryer section owing to flue gas, temperature promptly drops to below the acid dew point, so below the comb bed in second dryer section, still can form acid mist, parts such as the carrying roller of corrosion comb bed and support comb bed and bellows.
Summary of the invention
The technical problem that the present invention solves is, a kind of air-supply arrangement is provided, by this air-supply arrangement, hot blast from hot air source is mixed below the comb bed of drying grate with the flue gas that passes the bed of material, thereby the temperature of gaseous mixture is brought up to the temperature more than the acid dew point of gaseous mixture, prevent to form acid mist, avoid corroding the parts such as bed, the carrying roller that supports the bed of combing and bellows of combing.
In order to solve above technical problem, the invention provides a kind of air-supply arrangement, be installed in the drying grate, comprise first air supply duct that is communicated with hot air source, the castor bed below that is arranged on drying grate and the gas distributing device that is communicated with described first air supply duct, described gas distributing device comprises the ventilation member that a plurality of ventilations are directed upwardly.
Preferably, the ventilation direction of described ventilation member is corresponding with the slit between the carrying roller that supports the castor bed.
Preferably, described gas distributing device comprises the gas buffer housing that is arranged on castor bed below, and described gas buffer housing comprises that the upper wall parallel substantially with the castor bed, the lower wall corresponding with upper wall, the sidewall that is connected upper wall and lower wall, described ventilation member are arranged on the described upper wall and with the gas buffer enclosure interior and are communicated with.
Preferably, described air-supply arrangement also comprises the mixed gas passage that passes described gas buffer housing from the top down.
Preferably, described ventilation member is specially out at vertical through hole on the upper wall or the substantially vertical vertical tube that is installed on the upper wall.
Preferably, gas distributing device comprises many second air supply ducts that are communicated with first air supply duct, and described ventilation member is arranged on described second air supply duct.
Preferably, described ventilation member is specially out at vertical through hole on described second air supply duct or the substantially vertical vertical tube that is installed on described second air supply duct.
Preferably, described first air supply duct is provided with the ventilation member that a plurality of ventilations are directed upwardly.
Preferably, the described ventilation direction that is arranged on the ventilation member on first air supply duct is corresponding with the slit between the carrying roller that supports the castor bed.
Preferably, the described ventilation member that is arranged on first pipeline is specially out at vertical through hole on described first air supply duct or the substantially vertical vertical tube that is installed on described first air supply duct.
The present invention also provides a kind of drying grate, comprises first dryer section, second dryer section, first preheating section, second preheating section successively from infeed end one side, in described second dryer section, the described air-supply arrangement of above arbitrary technical scheme is installed.
The present invention also provides a kind of device for preparing pellet, comprising: the cooler of the rotary kiln of the described drying grate of technique scheme, the pelletizing of roasting after the drying grate preheating, the pelletizing of cooling behind rotary kiln baking.
The invention provides a kind of air-supply arrangement, be installed in the drying grate.According to the present invention, described air-supply arrangement comprises first air supply duct, is arranged on the comb bed below of drying grate and the gas distributing device that is communicated with described first air supply duct, and described gas distributing device comprises the ventilation member that ventilation is directed upwardly.Compared with prior art, by described ventilation member, can below the bed of combing, fully mix with the low-temperature flue gas that passes the bed of material from the hot blast of hot air source.The temperature of gaseous mixture can be increased to more than the acid dew point of gaseous mixture by the air quantity of adjusting hot air source, prevent dewfall, therefore can avoid corroding the comb bed of drying grate, carrying roller, bellows and other parts of support comb bed.
A kind of preferred embodiment in, described gas distributing device comprises a gas buffer housing, described ventilation member is arranged on the upper wall of gas buffer housing, the slit between the carrying roller of the position of ventilation member and the bed of support combing is corresponding.Like this, the flue gas that passes the bed of material can better mix at carrying roller on every side and below the bed of combing with the hot blast from hot air source, and the flue-gas temperature around comb a below and the carrying roller is brought up to more than the acid dew point, prevents dewfall, avoids corroding comb bed and the carrying roller that supports the bed of combing.
Description of drawings
Fig. 1 is a preparation pellet schematic representation of apparatus of the prior art;
Fig. 2 is the cutaway view of the DD2 section of the drying grate among Fig. 1;
Fig. 3 is the cutaway view that drying grate second dryer section of air-supply arrangement has been installed provided by the invention;
Fig. 4 is the schematic diagram of first kind of specific embodiment of air-supply arrangement shown in Figure 3;
Fig. 5 is for having the fragmentary cross-sectional view of the upper wall of through hole among Fig. 4;
Fig. 6 is the schematic diagram of second kind of specific embodiment of air-supply arrangement provided by the invention;
Fig. 7 is the schematic diagram of the third specific embodiment of air-supply arrangement provided by the invention;
Fig. 8 is the schematic diagram of the 4th kind of specific embodiment of air-supply arrangement provided by the invention.
The specific embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, but should be appreciated that these describe just to further specifying the features and advantages of the present invention, rather than to the restriction of claim of the present invention.
See also Fig. 3, be the cutaway view that drying grate second dryer section of air-supply arrangement has been installed provided by the invention, the cutaway view direction shown in Figure 3 and the direction of advance of the bed of material are perpendicular.In the bellows 104 of drying grate, be provided with the comb bed 102 that is used to carry material, on the bed 102 of combing, placing the bed of material 101 that constitutes by pelletizing, the bed of combing is supported by carrying roller group 103; Bellows 104 tops of drying grate are communicated with hot air source 11a, by this hot air source 11a, the high-temperature flue gas 201a of the dry bed of material is provided in drying grate, high-temperature flue gas 201a moves downwards from the bed of material 101 tops, pass the bed of material 101 after, the heat of high-temperature flue gas 201a is siphoned away by the bed of material, in bed of material bottom, high-temperature flue gas changes low-temperature flue gas into, because the temperature of low-temperature flue gas generally can be lower than the acid dew-point temperature of flue gas, therefore is easy to form acid mist.
In order to prevent that the low-temperature flue gas that passes the bed of material from forming acid mist, the present invention will deliver to the bed below of combing from the air-supply arrangement 202 that is arranged in the bellows from a part of high-temperature flue gas 201b of hot air source, and air-supply arrangement is provided with ventilation direction cardinal principle ventilation member straight up.Like this, the low-temperature flue gas that passes the bed of material 101 mixes the back with the high-temperature flue gas of sending into through air-supply arrangement 202 and forms mixed flue gas 201c below the bed of combing, mixed flue gas 201c temperature is enhanced more than the acid dew point, can prevent to form acid mist, be admitted to follow-up tail gas treatment device from bellows 104 interior discharges then.For the ventilation direction of ventilation member, can be in vertical direction with certain angle, but preferred general is straight up.
In the present embodiment, by from the part of smoke of preheating section hot air source as air-supply arrangement.For hot air source, be not limited to the flue gas of preheating section, can also hot-blast stove be set separately as hot air source, it is thermal source that hot-blast stove can adopt coal gas, perhaps other form of knowing of ability technical staff.
See also Fig. 4, be the schematic diagram of first kind of embodiment of air-supply arrangement shown in Figure 3.For ease of understanding, Fig. 4 to Fig. 7 102 and two carrying roller groups 103 of bed of partly combing of having drawn, this carrying roller group 103 is made of a plurality of parallel support roller 103a, between the adjacent support roller 103a slit 103b is arranged.In the present embodiment, described air-supply arrangement comprises first air supply duct 301 that is communicated with hot air source, the gas distributing device that is communicated with first air supply duct, described gas distributing device comprises gas buffer shell 302, and described gas buffer housing is arranged on the position of carrying roller group 103 belows of supporting the bed of combing.Gas buffer housing 302, comprise one with the parallel substantially upper wall 302a of bed 102 that combs, with the corresponding lower wall (not shown) of upper wall, be connected the sidewall 302c of upper wall and lower wall.For the shape of upper wall or lower wall, can be any known shape such as annular, triangular ring, changeable annular.Upper wall and lower wall preferably are of similar shape, and be preferred, and upper wall or lower wall have and the rectangle barrier shape of bed to correspondence of combing.
According to the present invention, on the gas buffer housing, preferably be provided with a plurality of mixed gas passage 302b that pass the gas buffer housing from the top down, by this mixed gas passage 302b, hot blast from hot air source passes the gas buffer housing with the gaseous mixture that passes the flue gas of the bed of material, flows out in bellows then.For shape and the quantity of mixed gas passage 302b, the present invention is also without particular limitation, as long as can realize making that gaseous mixture passes from the gas buffer housing easily.
The sidewall 302c of described upper wall 302a, lower wall, connection upper wall 302a and lower wall forms the cavity of gas buffer housing, by first air supply duct 301, is fed in the gas buffer housing from the hot blast of hot air source.
On upper wall 302a, on the corresponding position of slit 103b of the adjacent support roller 103a of described carrying roller group 103, vertical a plurality of vertical tube 302d are installed.Like this, after the hot blast of gas buffer enclosure interior is sent by 302d, mix with the low-temperature flue gas that passes the described bed of material.Since the position of vertical tube 302d open with the corresponding position of slit 103b of adjacent carrying roller on, therefore, mix mutually with the position of the low-temperature flue gas that passes the bed of material between adjacent support roller 103a from the hot blast of hot air source.Like this, by adjusting the air quantity of hot air source, the temperature of gaseous mixture can be brought up to the temperature more than the acid dew point of mixed flue gas, so can avoid forming acid mist.Because the environment around the carrying roller all mixed gas surrounds, therefore around comb bed bottom and carrying roller, can prevent to form acid mist, avoid causing corrosion to comb bed and carrying roller.
In the present embodiment, vertical tube 302d also can replace with other implementation of ventilation member.For example, on the upper wall with the corresponding position of vertical tube 302d on, can process the vertical through hole that is communicated with the gas buffer enclosure interior, by this through hole, also the hot blast from hot air source can be mixed with the low-temperature flue gas that passes the bed of material.As shown in Figure 5, the fragmentary cross-sectional view for the upper wall that has through hole on upper wall 302a, has a plurality of vertical through hole 302e, and described through hole 302e can be circular, conical, square or rectangle etc.
For air-supply arrangement provided by the invention, also has other embodiment.
See also Fig. 6, be the schematic diagram of second kind of specific embodiment of air-supply arrangement provided by the invention.In the present embodiment, described air-supply arrangement comprises first air supply duct 401 that is communicated with hot air source, the gas distributing device that is communicated with first air supply duct 401, described gas distributing device comprises many second air supply ducts 402 with the bed 102 substantially parallel settings of combing, described many second air supply ducts 402 be arranged in parallel, every second air supply duct 402 be arranged on and the adjacent support roller 103a of carrying roller group 103 between the corresponding position of slit 103b on.
On the tube wall of described second air supply duct 402, vertical a plurality of ventilation directions vertical tube 403 straight up that is equipped with.Like this, be admitted to first air supply duct 401 from the hot blast of hot air source after, be diverted in second air supply duct 402, after vertical tube 403 is discharged, mix with the low-temperature flue gas that passes the bed of material.Since the position of second air supply duct open with the corresponding position of slit 103b of adjacent support roller 103a on, therefore described hot blast from hot air source mixes mutually with the position of the low-temperature flue gas that passes the bed of material between adjacent support roller 103a.Like this, by adjusting the air quantity of hot air source, the temperature of mist can be brought up to the temperature more than the acid dew point of low-temperature flue gas, so can avoid forming acid mist.Because the environment of the environment around the carrying roller and the bed bottom of combing all by the filling of described gaseous mixture institute, therefore can prevent to form acid mist around comb bed bottom and carrying roller, avoid causing the corrosion to comb bed, carrying roller, bellows shell and other parts.
In the present embodiment, vertical tube 403 also can replace with other implementation of ventilation member.For example, on second air supply duct and vertical tube 403 corresponding positions, can process the ventilation direction vertical through hole straight up with the second air supply duct internal communication, also the hot blast from hot air source can be mixed with the low-temperature flue gas that passes the bed of material by this through hole.The shape of opening the through hole on upper wall that the shape of through hole is mentioned in can first kind of specific embodiment for air-supply arrangement.Described through hole can be circular, conical, square or rectangle etc.
Compare with the air-supply arrangement in first kind of embodiment, the air-supply arrangement of second kind of embodiment helps saving material, and the convenient below that is arranged on the comb bed.
Air-supply arrangement provided by the invention can also have other implementation.
See also Fig. 7, be the schematic diagram of the third specific embodiment of air-supply arrangement provided by the invention.In the present embodiment, described air-supply arrangement comprises first air supply duct 501 that is communicated with hot air source, the gas distributing device that is communicated with first air supply duct, described gas distributing device comprises that many second air supply duct, 504, the second air supply ducts 504 and first air supply ducts that be arranged in parallel with first air supply duct 501 were communicated with by communicating pipe 502.
In the present embodiment, on the tube wall of the tube wall of first air supply duct and second air supply duct, a plurality of ventilation directions vertical tube 503 straight up is set all.Slit 103b between the adjacent support roller 103a of the position of vertical tube 503 and carrying roller group 14 is corresponding.Like this, be admitted to first air supply duct 501 from the hot blast of hot air source after, in being diverted to second air supply duct 504 communicating pipe 502, after vertical tube 503 is discharged, mix with the low-temperature flue gas that passes the bed of material.Since the position of vertical tube 503 open with the corresponding position of slit 103b of adjacent support roller 103a on, therefore described hot blast from hot air source mixes mutually with the position of the low-temperature flue gas that passes the bed of material between adjacent support roller 103a.Like this, by adjusting the air quantity of hot air source, the temperature of mist can be brought up to the temperature more than the acid dew point of low-temperature flue gas, so can avoid forming acid mist.Because the environment of the environment around the carrying roller and the bed bottom of combing all by the filling of described gaseous mixture institute, therefore can prevent to form acid mist around comb bed bottom and carrying roller, avoid causing the corrosion to comb bed, carrying roller, bellows shell and other parts.
In the present embodiment, vertical tube 503 also can replace with other implementation of ventilation member.For example, on second air supply duct and vertical tube 503 corresponding positions, can process the ventilation direction vertical through hole straight up with the second air supply duct internal communication, also the hot blast from hot air source can be mixed with the low-temperature flue gas that passes the bed of material by this through hole.The shape of opening the through hole on upper wall that the shape of through hole is mentioned in can first kind of specific embodiment for air-supply arrangement.Described through hole can be circular, conical, square or rectangle etc.
See also Fig. 8, be the schematic diagram of the 4th kind of embodiment of air-supply arrangement provided by the invention.As shown in Figure 8, in the present embodiment, described air-supply arrangement comprises first air supply duct 601 that is communicated with hot air source, the gas distributing device that is communicated with first air supply duct, described gas distributing device comprises many 3rd air supply ducts 602 that are communicated with first air supply duct 601, described the 3rd air supply duct have a far-end 602a, with the corresponding near-end 602b of far-end, described far-end 602a is communicated with first air supply duct 601, and the position of slit 103b is corresponding between the position of described near-end 602b and the described support roller 103a.
On near-end, direction cardinal principle vertical tube 603 straight up is equipped with and ventilates.Like this, be admitted to first air supply duct 601 from the hot blast of hot air source after, be diverted in each the 3rd air supply duct 602, the vertical tube 603 from the near-end that is installed in the 3rd air supply duct 602 is discharged then, mixes with the low-temperature flue gas that passes the bed of material.Since the position of near-end 602b open with the corresponding position of slit 103b of two adjacent support roller 103a on, therefore described hot blast from hot air source mixes mutually with the position of the slit 103b of the low-temperature flue gas that passes the bed of material between two adjacent support rollers.Like this, by adjusting the air quantity of hot air source, the temperature of gaseous mixture can be brought up to the temperature more than the acid dew point of low-temperature flue gas, so can avoid forming acid mist.Because the environment of the environment around the carrying roller and the bed bottom of combing all by the filling of described gaseous mixture institute, therefore can prevent to form acid mist around comb bed bottom and carrying roller, avoid causing the corrosion to comb bed, carrying roller, bellows shell and other parts.
In the present embodiment, vertical tube 603 also can replace with other implementation of ventilation member.For example, on the near-end and vertical tube 603 corresponding positions of the 3rd air supply duct, can process the ventilation direction vertical through hole straight up with the 3rd air supply duct internal communication, also the hot blast from hot air source can be mixed with the low-temperature flue gas that passes the bed of material by this through hole.The shape of opening the through hole on upper wall that the shape of through hole is mentioned in can first kind of specific embodiment for air-supply arrangement.Described through hole can be circular, conical, square or rectangle etc.
The present invention also provides a kind of drying grate, is divided into first dryer section, second dryer section, first preheating section, second preheating section successively from infeed end one side, in described second dryer section, the air-supply arrangement described in any technical scheme of the present invention is installed.Like this, when drying grate carries out second level drying to pelletizing, by described air-supply arrangement, from the hot blast of hot air source and low-temperature flue gas by the second dryer section bed of material after mix the comb bed bottom of drying grate, by adjusting the air quantity of hot air source, the temperature of gaseous mixture can be brought up to more than the acid dew point of low-temperature flue gas,, be avoided other parts that corrode the comb bed, support carrying roller, bellows and the drying grate of the bed of combing so can prevent to form acid mist.
The present invention also provides a kind of device for preparing pellet, comprising: the cooler of the rotary kiln of the drying grate of preheating green pellets, the pelletizing of roasting after the drying grate preheating, the pelletizing of cooling behind rotary kiln baking; Described drying grate is divided into first dryer section, second dryer section, first preheating section, second preheating section successively from infeed end one side, in described second dryer section, the air-supply arrangement described in any technical scheme of the present invention is installed; Described cooler is divided into first cooling section, second cooling section, the 3rd cooling section successively from infeed end one side; The exhaust end of described first cooling section is communicated with rotary kiln, and the exhaust end of rotary kiln is communicated with the inlet end of second preheating section.The exhaust end of described second cooling section is communicated with first preheating section, the exhaust end of described second preheating section is communicated with second dryer section, and the exhaust end of described the 3rd cooling section is communicated with first dryer section.When drying grate carries out second level drying to pelletizing, by described air-supply arrangement, from the hot blast of hot air source and low-temperature flue gas by the second dryer section bed of material after mix the comb bed bottom of drying grate, by adjusting the air quantity of hot air source, the temperature of gaseous mixture can be brought up to more than the acid dew point of low-temperature flue gas, so can prevent to form acid mist, avoid other parts that corrode the comb bed, support carrying roller, bellows and the drying grate of the bed of combing.
In addition, for the air-supply arrangement that the present invention mentioned, be not limited to be installed in second dryer section, also can be installed in first dryer section, first preheating section of drying grate, so long as need the various piece of the discharge flue-gas temperature of raising drying grate, all air-supply arrangement provided by the invention can be installed.
For the hot air source that the present invention mentioned, be not limited to the flue gas of second preheating section, can also hot-blast stove be set separately as hot air source, it is fuel that hot-blast stove can adopt coal gas, other form that also can adopt the ability technical staff to know.
For the pelletizing of being mentioned herein, mainly made by iron-bearing material, for iron-bearing material, the present invention and without particular limitation can be in the pelletizing powder of bloodstone, sulfate slag, magnetic iron ore, siderite, limonite, pyrite or recovery one or more.
More than be described in detail the invention provides a kind of air-supply arrangement and drying grate.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (12)
1. air-supply arrangement, be installed in the drying grate, comprise first air supply duct that is communicated with hot air source, the comb bed below that is arranged on drying grate and the gas distributing device that is communicated with described first air supply duct, described gas distributing device comprises the ventilation member that a plurality of ventilations are directed upwardly.
2. air-supply arrangement according to claim 1 is characterized in that, the ventilation direction of described ventilation member is corresponding with the slit between the support roller that supports the bed of combing.
3. air-supply arrangement according to claim 1 and 2, it is characterized in that, described gas distributing device comprises the gas buffer housing that is arranged on the bed below of combing, described gas buffer housing comprises with the parallel substantially upper wall of bed of combing, the lower wall corresponding with upper wall, is connected the sidewall of upper wall and lower wall, and described ventilation member is arranged on the described upper wall and with the gas buffer enclosure interior and is communicated with.
4. air-supply arrangement according to claim 3 is characterized in that, also comprises the mixed gas passage that passes described gas buffer housing from the top down.
5. air-supply arrangement according to claim 3 is characterized in that, described ventilation member is specially out at the vertical through hole on the upper wall or is the vertical vertical tube that is installed on the upper wall substantially.
6. air-supply arrangement according to claim 1 and 2 is characterized in that, described gas distributing device comprises many second air supply ducts that are communicated with first air supply duct, and described ventilation member is arranged on described second air supply duct.
7. air-supply arrangement according to claim 6 is characterized in that, described ventilation member is specially out at vertical through hole on described second air supply duct or the substantially vertical vertical tube that is installed on described second air supply duct.
8. air-supply arrangement according to claim 7 is characterized in that, described first air supply duct is provided with the ventilation member that a plurality of ventilations are directed upwardly.
9. air-supply arrangement according to claim 8 is characterized in that, the described ventilation direction that is arranged on the ventilation member on first air supply duct is corresponding with the slit between the support roller that supports the bed of combing.
10. air-supply arrangement according to claim 9 is characterized in that, the described ventilation member that is arranged on first pipeline is specially out at vertical through hole on described first air supply duct or the substantially vertical vertical tube that is installed on described first air supply duct.
11. a drying grate comprises first dryer section, second dryer section, first preheating section, second preheating section successively from infeed end one side, in described second dryer section, each described air-supply arrangement of claim 1 to 10 is installed.
12. a device for preparing pellet comprises: the cooler of the rotary kiln of the described drying grate of claim 11, the pelletizing of roasting after the drying grate preheating, the pelletizing of cooling behind rotary kiln baking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101485282A CN101650127B (en) | 2009-06-26 | 2009-06-26 | Blast device, grate and pellet preparation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101485282A CN101650127B (en) | 2009-06-26 | 2009-06-26 | Blast device, grate and pellet preparation device |
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| CN101650127A CN101650127A (en) | 2010-02-17 |
| CN101650127B true CN101650127B (en) | 2011-01-05 |
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| CN2009101485282A Active CN101650127B (en) | 2009-06-26 | 2009-06-26 | Blast device, grate and pellet preparation device |
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| JP6264383B2 (en) * | 2015-02-19 | 2018-01-24 | Ｊｆｅスチール株式会社 | Corrosive gas handling equipment and repair method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1510380A (en) * | 2002-12-26 | 2004-07-07 | 首钢总公司 | Grate |
| CN101055147A (en) * | 2007-01-08 | 2007-10-17 | 武汉钢铁集团矿业有限公司程潮铁矿 | Chain grate-rotary kiln preheating section single-side air draft process |
| CN201172676Y (en) * | 2008-04-14 | 2008-12-31 | 顾玲 | Process wind system of drying grate-rotary kiln-circular cooler for producing acid pellet |
-
2009
- 2009-06-26 CN CN2009101485282A patent/CN101650127B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1510380A (en) * | 2002-12-26 | 2004-07-07 | 首钢总公司 | Grate |
| CN101055147A (en) * | 2007-01-08 | 2007-10-17 | 武汉钢铁集团矿业有限公司程潮铁矿 | Chain grate-rotary kiln preheating section single-side air draft process |
| CN201172676Y (en) * | 2008-04-14 | 2008-12-31 | 顾玲 | Process wind system of drying grate-rotary kiln-circular cooler for producing acid pellet |
Non-Patent Citations (1)
| Title |
|---|
| 陈三凤,任伟.链篦机-回转窑球团工艺有关技术问题的探讨.《烧结球团》.2006,第31卷(第4期),11-14. * |
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