CN102914166B - Method for guaranteeing hot air flow penetrating through sintering ore layer - Google Patents
Method for guaranteeing hot air flow penetrating through sintering ore layer Download PDFInfo
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Abstract
A method for guaranteeing hot air flow penetrating through a sintering ore layer belongs to the technical field of fan and pipe network setting in a sintering machine system. The invention aims at solving the main technical problems that a reason of the reduction of hot air flow penetrating through the sintering ore layer when hot air, in particular high-temperature hot air is adopted for sintering is found out and a solution is provided; and on the premise that the hot air flow capable of penetrating through the sintering ore layer meets the requirement of a sintering process, the power minimization of the fan is realized. The method disclosed by the invention comprises the supply of air and/or hot air and the setting of the fan and the fan pipe network. The method disclosed by the invention is characterized in that at least one independent fan is arranged between an air bellow at the front part of the sintering machine and an exhaust manifold. The method disclosed by the invention is suitable for sintering machines which are widely applied to the iron and steel metallurgy industry.
Description
Technical field
The present invention relates to a kind of method that the hot air flow of the sintering deposit bed of material is passed through in guarantee, belong to the technical field of blower fan in sintering machine system and network collocation.
Background technology
Sintering is one of process procedure extensively adopted in present steel metallurgy industry; Sintering machine has been again the visual plant of sintering process.In existing sintering machine system, blower fan and network collocation be usually as shown in Figure 1: each bellows 4 and air draft house steward 16 by passage 14 directly UNICOM, under the effect of air-introduced machine 19, from the sintered discharge gas of bellows through dedusting and/or other process, such as desulfurization, energy recovery, rear discharge.
Blower fan and the network collocation Problems existing of existing sintering machine system comprise:
1. in the whole process of sintering, the air-pressure drop dropped on the sintering deposit bed of material is roughly the same, due to the carrying out along with sintering process, and the change of the physicochemical property of the sintering deposit bed of material, the gas permeability of itself there occurs obvious change, thus causes the unbalanced of the ventilation of each several part; Particularly the ventilation of feed end (i.e. firing tip) is obviously on the low side, and delivery end ventilation is obviously on the high side.In order to ensure the primary demand of feed end place to air draught amount, just needing the pressure head increasing main exhauster, improving the power of main exhauster.Consequently, the ventilation of delivery end, by the demand apparently higher than sintering process, causes the waste of energy.Although can delivery end and near the airduct place of bellows install choke valve additional to dispatch ventilation, the resistance of choke valve is damaged and is caused energy loss still to need main exhauster to bear.
2., when adopting hot gas sintering technique, when particularly adopting high-temperature hot-air sintering process, the operating mode volume of hot blast, particularly high-temperature hot-air will be significantly higher than mark condition volume.At hot blast, the particularly sintering stage of high-temperature hot-air, when needs maintain hot blast, when particularly the mark condition flow of high-temperature hot-air is constant, just need larger pressure head, and because the position supplying hot blast, particularly high-temperature hot-air is just near the position of feed end (i.e. firing tip), this is just degrading the problem of the sintering deposit bed of material ventilation deficiency of this position further.
Summary of the invention
Object of the present invention is a kind of method that guarantee will be provided to pass through the hot air flow of the sintering deposit bed of material, to overcome the shortcoming that prior art exists, particularly when employing higher temperature, such as 250 DEG C, 350 DEG C, 450 DEG C even higher, hot blast when sintering.
The main technical problem to be solved in the present invention is:
1. solve in existing sintering machine, the ventilation of different sintered location can not realize simultaneously or realize optimization substantially simultaneously, thus the problem causing fan energy consumption higher.
2. find out employing hot blast, when particularly adopting high-temperature hot-air sintering, the reason causing the hot air flow passing through the sintering deposit bed of material to reduce also proposes solution.Particularly, the reason that the present invention confirms to cause the hot air flow passing through the sintering deposit bed of material to reduce is: hot blast, particularly the operating mode volume of high-temperature hot-air is significantly higher than mark condition volume, therefore, when keeping its mark condition flow constant, it passes through the sintering deposit bed of material, operating mode velocity ratio mark condition flow velocity when particularly passing through the top layer of the sintering deposit bed of material adds many, and the pressure drop thus dropped on sintering ore bed also increases thereupon; So when dropping on the pressure drop on sintering ore bed and being constant, its flow must reduce.When needing to keep its mark condition flow constant, one of scheme of solution increases the pressure reduction dropped on the sintering ore bed at this place.
3. at least do not increase or reduce add blower fan reactance capacity prerequisite under, improve the pressure reduction of warm-air supply section, make the mark condition supply of the hot blast of this section, particularly high-temperature hot-air meet the technological requirement of sintering.In other words, exactly do not increase or reduce add blower fan reactance capacity prerequisite under, make the requirement of crossing air quantity and sintering process of different sintering stages more identical.
4., in sintering process, particularly when carrying out hot gas sintering, making to drop on pressure reduction on the bed of material of sintering machine or pressure drop by section and/or adjustable by bellows, reducing by more than the air quantity of sintering process requirement to greatest extent, to realize minimizing of sintering machine fan energy consumption.
Basic technical scheme of the present invention is: the method for the hot air flow of the sintering deposit bed of material is passed through in a kind of guarantee, comprise the setting of the supply of air and/or hot blast, blower fan and pipe network thereof, it is characterized in that: have at least the blower fan of a platform independent to be arranged between the bellows of sintering machine front portion and air draft house steward.Described " sintering machine is anterior " refers to the part near ignition of sintering process device; Also the part between combustion zone and grate-layer material intersection arising from ignition of sintering process device and terminate in sintering ore bed can be referred to; Can also roughly, described " sintering machine is anterior " refers to the part (namely from the middle part to feed end (or igniter) of sintering machine) before in the middle part of sintering machine.If desired, also suggestion makes described independently blower fan have the function of speed governing (adjusting flow or pressure regulation head), such as, adopts variable-frequency motor to carry out speed governing etc.
Working head≤the 3900Pa of the independently blower fan also selected by suggestion.
Be in the air quantity excessively of the sintering deposit of diverse location for the ease of adjustment, also advise the part bellows at least in sintering machine front portion or the independently blower fan often arranged between group bellows and air draft house steward described in after the part bellows of sintering machine front portion are divided into groups.Such as, in the corresponding position adopting hot gas sintering, part bellows or the blower fan that a platform independent is often set between group bellows and air draft house steward after dividing into groups can be made; If desired, can also comprise between the bellows corresponding with the position of igniter and air draft house steward and independently blower fan etc. is also set.
If desired, the blower fan of a platform independent also at least can also be set between all the other bellows of sintering machine and air draft house steward." all the other bellows " mentioned here refer to, the bellows beyond the bellows that the independently blower fan described in passing through previously is connected with described air draft house steward.Further, can also at all the other bellows of sintering machine or the blower fan often arranging a platform independent between group bellows and air draft house steward after dividing into groups to all the other bellows of sintering machine.
In order to reduce the general power of blower fan system further, suggestion makes the working head of main exhauster account for 65 ± 20% of sintering machine induced draught system total head, and the working head of described independently blower fan accounts for 35 ± 20% of sintering machine induced draught system total head; If desired, above-mentioned pressure head distributes, and can also be 60 ± 20% and 40 ± 20%, 65 ± 15% and 35 ± 15% or 60 ± 15% and 40 ± 15% etc.The overall presure drop that " sintering machine induced draught system total head " described here is required referring to from the air inlet face of sinter bed to chimney air exit; Due in the present invention, the upper pressure drop dropping on the sintering deposit bed of material of zones of different is different, therefore, should be understood to an average to so-called " sintering machine induced draught system total head ".The reason of distributing pressure head is according to the method described above: when the working head of two series connection blower fans is equal, and under the condition that flow system flow is constant, the total power consumption of blower fan is minimum; Notice under the air quantity of main exhauster is the condition of at least two independently blower fan sums, because the efficiency of the large blower fan of air quantity is higher, therefore, makes it share slightly many pressure heads, will more be conducive to energy-conservation.In fact, be only the blower fan being 18kPa by a working head use instead two working heads be 9kPa wait air quantity fans in series after, inherently have obvious energy-saving effect.
Main beneficial effect of the present invention is:
1. in sintering machine, can realize or substantially realize the optimization of the ventilation of different sintered location, thus reduce the energy consumption of Sinter air machine.
2. can meet hot blast fully, when particularly high-temperature hot-air sinters, the requirement of the ventilation of the bed of material, can utilize hot blast, and particularly more oxygen and heat energy are imported sinter bed by high-temperature hot-air, both improve the condition of sintering reaction, contribute to again the realization of energy-conservation target; Meanwhile, can also realize to cross air quantity segmentation and/or draught distributing box adjustable, made the requirement of air quantity and sintering process more identical, strong to the adaptation energy of the change of sintering process.
3., under can meeting ensureing to pass through the air of the sintering deposit bed of material and/or hot air flow the prerequisite that sintering process requires, realize the minimum power of blower fan.
Accompanying drawing explanation
Drawings attached of the present invention 9 pages, totally 9 width.Wherein:
Fig. 1 is the blower fan of prior art related to the present invention and the schematic diagram of network collocation.
Fig. 2 is the schematic diagram of embodiments of the invention 1.
Fig. 3 is the schematic diagram of embodiments of the invention 2.
Fig. 4 is the schematic diagram of embodiments of the invention 3.
Fig. 5 is the schematic diagram of embodiments of the invention 5.
Fig. 6 is the schematic diagram of embodiments of the invention 6.
Fig. 7 is the schematic diagram of embodiments of the invention 7.
Fig. 8 is the schematic diagram of embodiments of the invention 8.
Fig. 9 is the schematic diagram of embodiments of the invention 4.
Detailed description of the invention
The specific embodiment of the present invention is incited somebody to action in conjunction with the embodiments and accompanying drawing is described.
Embodiment 1, as shown in Figure 2.
In fig. 2,1 is the great wheel of sintering machine.2 is tail wheels of sintering machine.3 is chassis of sintering machine.4 is bellows of sintering machine.5 is distributing devices of the grate-layer material of sintering machine.6 is distributing devices of the sintering deposit of sintering machine.7 is igniters of sintering machine.8,9,10,11,12 and 13 is all the hot blast fan housing of sintering machine, and certainly, they can also be altered to more or less number, also they can be merged into one; Described hot blast fan housing is divided into the difference that multiple objects is according to temperature, realize air zoning, usually, the closer to igniter 7, the hot blast temperature of feeding is higher, and such as, the hot blast that temperature is the highest normally utilizes hot blast fan housing 8 to send into the sintering deposit bed of material.14 is the passages connecting bellows and air draft house steward.15 is independently blower fans, and preferably makes it the function with speed governing (adjusting flow or pressure regulation head), such as, adopts variable-frequency motor driving etc.16 is air draft house stewards.17 is rough cleaners, and it can be gravitational precipitator, inertial dust separator etc.18 is smart dedusters, and shown in figure is sack cleaner, and certainly, it also can be electric cleaner etc.19 is main exhausters.20 is chimneys.21 is the high-temperature hot-air access roades entering sinter bed, and in the present embodiment, it is respectively provided with one on each hot blast fan housing.Arrow 22 represents the flow direction of air at room temperature.
In the present embodiment, the working head that main exhauster 19 sets is about 18000Pa, the course of work related to the present invention is: when main exhauster 19 and independently blower fan 15 start after, enter from access road 21 bed of material that the hot blast of hot blast fan housing 8-13 and air at room temperature enter sintering deposit respectively, then pass through the bed of material and enter air draft house steward 16 by bellows 4, passage 14; Wherein, the sintering tail gas from sintering machine front portion, corresponding with hot blast input part bit position part bellows also have passed through independently blower fan 15.Finally, sinter tail gas to be diffused by chimney 20 through deduster 17,18 and main exhauster 19.
Owing to being provided with independently blower fan 15, the pressure reduction dropping on the sintering deposit bed of material corresponding to bellows be connected with this blower fan is increased, one of its result makes relatively to be increased by the air quantity of this place's sintering deposit bed of material, to make up the deficiency in draught owing to causing when employing hot blast, particularly employing high-temperature hot-air, thus achieve part object of the present invention.
Be necessary such as, it is noted that due to the existence of main exhauster 19, independently blower fan 15 role is additional mechanical supercharging, therefore, can select lower pressure head, and pressure head can be selected at 3900Pa and following blower fan, particularly axial fan.In the present embodiment, when the hot blast temperature entering hot blast fan housing 8 is at about 350 DEG C, the span of this independently pressure head of blower fan is 1600Pa to 2700Pa.
Be not difficult to find out by the present embodiment, it has and has at least the blower fan of a platform independent to be arranged on feature between the bellows of sintering machine front portion and air draft house steward.
Embodiment 2, as shown in Figure 3.
The present embodiment is the one change carried out on the basis of embodiment 1.Main change point is: it utilizes independently blower fan 23,24 and 25 to instead of the independently blower fan 15 in embodiment 1, and pass through different set or the adjustment of the independently pressure head of blower fan 23,24 and 25, make the air quantity passing through the sintering deposit bed of material more meet the requirement of the sintering process of respective section, make the change region refinement more of air quantity.Say by the words comparing summary, it is after dividing into groups to the part bellows of sintering machine front portion, makes often to organize the independently blower fan be provided with between bellows and air draft house steward described in.In the present embodiment, when the hot blast temperature entering hot blast fan housing 8 is at about 250 DEG C, can the working head of independently blower fan 23 be set between 1200Pa to 1600Pa; The working head of independently blower fan 24 is set between 800Pa to 1200Pa; The working head of independently blower fan 25 is set between 400Pa to 800Pa.
All the other contents, are understood by the relevant explanation in embodiment 1.
Be not difficult to find out by the present embodiment, it is except having the essential characteristic of embodiment 1, also add the feature etc. often arranging the independently blower fan described between group bellows and air draft house steward after dividing into groups to the part bellows of sintering machine front portion.
Embodiment 3, as shown in Figure 4.
The present embodiment is the one change carried out on the basis of embodiment 1 and embodiment 2.Main change point is: it utilizes independently blower fan 26 (totally 10) to instead of the independently blower fan 15 in embodiment 1 and the independently blower fan in embodiment 2 23,24 and 25, and by the different set of the working head of each blower fan in independently blower fan 26 or adjustment, the air quantity passing through the sintering deposit bed of material can, according to section corresponding to each bellows to meet the requirement of sintering process, be made to realize optimization between the demand and supply of air quantity.Specifically, in the present embodiment, when the hot blast temperature entering hot blast fan housing 8 is at about 350 DEG C, can the working head of independently blower fan 26 be set between 300Pa to 2200Pa, particularly, with regard to single independently blower fan, except the pressure head of left side First independently blower fan is according to except about 400Pa setting (object is the air leak rate of air curtain preventing from causing end seal too high), all the other independently blower fan working head can in the scope of 300Pa to 2200Pa, from left to right proportionate relationship linearly progressively reduce.
All the other contents, the relevant explanation by embodiment 1 and embodiment 2 is understood.
Be not difficult to find out by the present embodiment, it is except having the essential characteristic of embodiment 1, also has the feature respectively arranging the independently blower fan described between the part bellows and air draft house steward of sintering machine front portion.
Embodiment 4, as shown in Figure 9.
The present embodiment is the one change carried out on the basis of embodiment 2.Main change point is: it utilizes independently blower fan 30 (totally 4) to instead of the independently blower fan 23,24 and 25 in embodiment 2, and by the different set of the pressure head of each blower fan in independently blower fan 30 or adjustment, the air quantity passing through the sintering deposit bed of material can, according to often organizing section corresponding to bellows to meet the requirement of sintering process, be made to realize optimization between the demand and supply of air quantity.Specifically, in the present embodiment, when the hot blast temperature entering hot blast fan housing 8 is at about 350 DEG C, the working head of leftmost independently blower fan 30 can be set in about 500Pa, to avoid the inleakage too increasing end seal; And the working head of all the other independently blower fans is set between 300Pa to 2500Pa, such as, the pressure head of the 2nd, 3,4 independently blower fan from left to right can be made to be set as 2500Pa, 1400Pa and 300Pa.
All the other contents, the relevant explanation by embodiment 2 is understood.
Embodiment 5, as shown in Figure 5.
The present embodiment is the one change carried out on the basis of embodiment 1.Main change point is: increase independently blower fan 27; Meanwhile, also adjust to some extent with the bellows number that independently blower fan 15 is connected.In addition, the working head of blower fan is also adjusted to some extent: when the hot blast temperature entering hot blast fan housing 8 is at about 300 DEG C, the working head of main exhauster 19 is set in about 10kPa; The working head of independently blower fan 15 is set in about 9.2kPa; The working head of independently blower fan 27 is set in about 8kPa.If desired, then pass through the function of the speed governing (adjusting flow or pressure regulation head) that independently blower fan has, carry out adjustment among a small circle.The intention done like this is: when the working head of two series connection blower fans is equal, and under the condition that flow system flow is constant, the total power consumption of blower fan is minimum; Notice that the air quantity of now main exhauster is two independently blower fan sums, because the efficiency of the large blower fan of air quantity is higher, therefore, make it share slightly many pressure heads, will advantageously in energy-conservation.
All the other contents, the relevant explanation by embodiment 1 is understood.
Be not difficult to find out from the present embodiment, it has the feature also at least arranging the blower fan 27 of a platform independent between all the other bellows and air draft house steward of sintering machine; Meanwhile, the pressure head also with main exhauster accounts for 65 ± 20% of sintering machine induced draught system total head, and the pressure head of described independently blower fan accounts for the feature of 35 ± 20% of sintering machine induced draught system system total head.
Embodiment 6, as shown in Figure 6.
The present embodiment is the one change carried out on the basis of embodiment 5.Main change point is: it is all provided with independently blower fan 28 on each bellows 4 with the interface channel 14 of air draft house steward 16, make crossing air quantity and all can independently arranging and/or adjustable of each bellows 4, the air quantity passing through the sintering deposit bed of material can, according to section corresponding to each bellows to meet the requirement of sintering process, be made to realize optimization between the demand and supply of air quantity.In addition, can handle according to following principle the setting of the working head of each blower fan: when the hot blast temperature entering hot blast fan housing 8 is at about 300 DEG C, the working head of main exhauster 19 is set in about 10kPa; The working head of independently blower fan 28 to be set in the scope of 9.2kPa-8kPa, and with regard to single independently blower fan 28, its working head can from left to right linearly proportionate relationship progressively reduce.If desired, then pass through the function of the speed governing (adjusting flow or pressure regulation head) that independently blower fan has, carry out necessary accommodation.
All the other contents, the relevant explanation by embodiment 5 or other embodiment is understood.
Be not difficult to find out from the present embodiment, it is except having the basic technical features of embodiment 5, also has the feature respectively arranging the blower fan of a platform independent between all the other bellows and air draft house steward of sintering machine.Meanwhile, the pressure head that the present embodiment also has main exhauster accounts for 65 ± 20% of sintering machine induced draught system total head, and the pressure head of described independently blower fan accounts for the feature etc. of 35 ± 20% of sintering machine induced draught system system total head.
Embodiment 7, as shown in Figure 7.
The present embodiment is the one change carried out on the basis of embodiment 4 and embodiment 6.Main change point is: its independently blower fan 29 is configurations like this: because the bellows being positioned at two ends are all adjacent with end seal, have certain particularity, therefore, the bellows being positioned at right-hand member arrange separately the blower fan of a platform independent; All the other then every 3 bellows configure the blower fan of a platform independent, this be due to adjacent 3 bellows between the more close cause of condition of work.
In addition, can handle according to following principle the setting of the working head of each blower fan: when the hot blast temperature entering hot blast fan housing 8 is at about 300 DEG C, the working head of main exhauster 19 is set in about 10kPa; The working head of independently blower fan 29 is set in the scope of 8.7kPa-8kPa, and with regard to single independently blower fan 29, the working head of the independently blower fan 29 of left end first can be set as 8.6kPa, then reduce 0.12kPa to the right successively and arrange; Meanwhile, also adjustment be should give to the working head of independently blower fan 30, can according to being set as from left to right: 8.5kPa, 9.2kPa, 9.0kPa, 8.7kPa.If desired, then pass through the function of the speed governing (adjusting flow or pressure regulation head) that independently blower fan has, necessary accommodation is carried out to all independently blower fans.
All the other contents, the relevant explanation by embodiment 4 and embodiment 6 is understood.
Be not difficult to find out from the present embodiment, it has after dividing into groups to all the other bellows of sintering machine, makes it often organize to arrange between bellows and air draft house steward the feature of the blower fan 29 of a platform independent; , can understand the result of " dividing into groups to all the other bellows of sintering machine " so here: first, the right bellows are separately one group, all the other bellows are one group according to every 3 bellows and divide.Meanwhile, the pressure head that the present embodiment also has main exhauster accounts for 65 ± 20% of sintering machine induced draught system total head, and the pressure head of described independently blower fan accounts for the feature etc. of 35 ± 20% of sintering machine induced draught system system total head.
Be it can also be seen that by above-described embodiment, the diversity of the embodiment of independently blower fan is set between each bellows of sintering machine and air draft house steward, therefore, be difficult to the various feasible scheme of limit.
Embodiment 8, as shown in Figure 8.
The present embodiment is the one change carried out on the basis of embodiment 7.Main change point is: which eliminate main exhauster 19; When the hot blast temperature entering hot blast fan housing 8 is at about 300 DEG C, the working head of independently blower fan 29 is set in the scope of 19000Pa-17000Pa; And for single independently blower fan 29, except its pressure head can be made from left to right in except step-like reduction, its working head can also from left to right linearly relation progressively reduce.Such as, by from the left side front 2 independently blower fan 29 pressure head respectively by 19000Pa control condition under, often move to right a position, can by the pressure head of the independently blower fan 29 of this position relative on the left of it independently blower fan reduce 250Pa.If desired, then pass through the function of the speed governing (adjusting flow or pressure regulation head) that independently blower fan has, carry out necessary accommodation.The same with the various embodiments described above, the hot air flow that its object still will ensure to pass through the sintering deposit bed of material better meets the requirement of sintering process.
All the other contents, the relevant explanation by embodiment 7 is understood.
In addition it is to be noted that above-described embodiment is all case of the present invention, one of their effect plays explanation to the present invention, and should not be construed as any restriction made the present invention.
Claims (4)
1. a method for the hot air flow of the sintering deposit bed of material is passed through in guarantee, comprises the setting of the supply of air and/or hot blast, blower fan and pipe network thereof, it is characterized in that: have at least the blower fan of a platform independent to be arranged between the bellows of sintering machine front portion and air draft house steward; Described independently blower fan has the function of speed governing; Described hot blast fan housing is divided into multiple, to realize the different air zonings according to temperature; The working head of its main exhauster accounts for 65 ± 20% of sintering machine induced draught system total head, and the working head of described independently blower fan accounts for 35 ± 20% of sintering machine induced draught system total head; Working head≤the 3900Pa of described independently blower fan;
The course of work is: when main exhauster (19) and independently blower fan (15) start after, enter from access road (21) bed of material that the hot blast of hot blast fan housing and air at room temperature enter sintering deposit respectively, then pass through the bed of material and enter air draft house steward (16) by bellows (4), passage (14); Wherein, the sintering tail gas from sintering machine front portion, corresponding with hot blast input part bit position part bellows also have passed through independently blower fan (15); Finally, sinter tail gas to be diffused by chimney (20) through deduster and main exhauster (19).
2. the method for the hot air flow of the sintering deposit bed of material is passed through in guarantee as claimed in claim 1, it is characterized in that: the blower fan often arranging a platform independent between group bellows and air draft house steward after the part bellows at least in sintering machine front portion or the part bellows to sintering machine front portion divide into groups.
3. the method for the hot air flow of the sintering deposit bed of material is passed through in guarantee as claimed in claim 1, it is characterized in that: the blower fan also at least arranging a platform independent between all the other bellows and air draft house steward of sintering machine.
4. the method for the hot air flow of the sintering deposit bed of material is passed through in guarantee as claimed in claim 3, it is characterized in that: all the other bellows of sintering machine or the blower fan often arranging a platform independent between group bellows and air draft house steward after dividing into groups to all the other bellows of sintering machine.
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| CN107120977B (en) * | 2017-04-14 | 2019-03-29 | 北京首钢自动化信息技术有限公司 | Sintering desulfurization and main exhaust fan combined control method |
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