CN103409581B - Continuous external heating type reducing gases DRI integrated approach - Google Patents

Continuous external heating type reducing gases DRI integrated approach Download PDF

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CN103409581B
CN103409581B CN201310346047.9A CN201310346047A CN103409581B CN 103409581 B CN103409581 B CN 103409581B CN 201310346047 A CN201310346047 A CN 201310346047A CN 103409581 B CN103409581 B CN 103409581B
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reduction
chamber
combustion chamber
reducing gases
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CN103409581A (en
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王新民
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Shanxi Xinli Energy Technology Co Ltd
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Shanxi Xinli Energy Technology Co Ltd
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Abstract

The open continuous external heating type reducing gases DRI integrated approach of the present invention, step is: (1), lump ore or iron ore pellets preheating are sent into reduction chamber; (2), adopt duplex combustion chamber and commutation accumulation of heat heating means to purifying rear gas-fired by outer gas-operated thermal bath facility, interior gas-operated thermal bath facility, thermal source is provided to reduction chamber, the waste gas after burning by water wash one's hair purify after discharge; (3), the DRI cooling of reducing gases after to reduction reaction and form high temperature reduction gas; (4), high temperature reduction gas enters reduction chamber and high temperature lump ore or iron ore pellets material and carries out tail gas after reduction reaction generation high temperature reduction; (5), will reduce after tail gas import pre-heating cabin to lump ore or iron ore pellets preheating, the tail gas after preheating and condensed water are washed one's hair emission abatement through water; (6), according to lump ore or iron ore pellets reducing degree, lump ore or iron ore pellets are added to the reduction chamber of reduction apparatus in good time, the solid product DRI after reduction cooling is entered to sealing finished bin.

Description

Continuous external heating type reducing gases DRI integrated approach
Technical field
The present invention relates to gas base method reduced iron technology, particularly continuous external heating type reducing gases DRI integrated approach.
Background technology
At present, produce DRI (DRI) by using reducing agent difference, mainly contain the large class of the gentle base method two of coal-based method. Gas base method is mainly manufactured reducing gases or is replaced natural gas as reducing agent and thermal source taking coke-stove gas (COG), converter gas and (or) blast furnace (BF) stock gas with natural gas or with coal, and coal-based method is taking coal as reducing agent with thermal source. Coal-based method has kinds of processes, but production efficiency low, invest high, pollute greatly, the base method that makes to bring about the desired sensation becomes the main flow of direct reduction iron making.
Traditional gas base method is taking Shaft Furnace Direct Reduction Process as technological trend, along with the development of gas-based shaft kiln directly reduced technology, now also there are many technical literature introductions, as patent documentation CN102304599A has introduced a kind of gas base reduction shaft furnace and has produced the method and apparatus of DRI, the literature is mainly that coke-stove gas is first isolated to H2 and Lin De gas, again H2 and coal gas Hybrid Heating are become to reducing gases, woods moral gas is as refrigerating gas, the shortcoming of this technology is that H2 and coal gas Hybrid Heating need to be consumed to heat energy, and production cost can increase; In addition about the gas base method patent documentation method that the self-produced reducing gases of a kind of iron ore_coal pellet is produced DRI as CN1896286B introduces, utilize the reducing gases of heating to pass in reduction shaft furnace, heat new iron ore_coal pellet, produce new pyrolysis gas H2, CO and top gas CO2, H2O, the circulation of the Primordial Qi of surviving in formation is produced and is used, the shortcoming of this technology is to produce actual being easy to of new pyrolysis gas H2, CO to generate CO2, H2O in body of heater burning, the H2, the CO that obtain are little, are difficult to realize continuous, efficient, a large amount of reduced irons and produce.
Given this, the inventor has carried out deep analysis and research to gas-based shaft kiln directly reduced technique, has invented a whole set of new gas-based shaft kiln directly reduced iron composite technology technology.
Summary of the invention
The invention provides continuous external heating type reducing gases DRI integrated approach, the method is serially connected DRI preheating, reduction, heating and cooling, tail gas clean-up, and reduction efficiency is high, and energy consumption is little, clean tail gas discharge, is applicable to the also original production of continuously a large amount of DRIs.
The present invention is achieved through the following technical solutions: continuous external heating type reducing gases DRI integrated approach, and the method relates to equipment and comprises that continuous external heating type reducing gases direct-reduction iron furnace, tail gas water washes one's hair clarifier; Described continuous external heating type reducing gases direct-reduction iron furnace comprises body of heater, pre-heating cabin, enters stove cloth passage, tail gas passing away, discharge with endless screw device, sealing finished bin after external-heat reducing gases DRI device, reduction; Step is:
(1), by lump ore or iron ore pellets are sent into preheating in pre-heating cabin, then enter by entering stove cloth passage in the reduction chamber of reduction apparatus of external-heat reducing gases DRI device;
(2), the outer gas-operated thermal bath facility of the reduction apparatus by external-heat reducing gases DRI device, interior gas-operated thermal bath facility adopt duplex combustion chamber and commutation accumulation of heat heating means to burn to purified gas, thermal source is provided to reduction chamber, lump ore or iron ore pellets reduce under hot environment in reduction chamber, and the waste gas after purified gas burning is washed one's hair clarifier by tail gas water and carried out after water is washed one's hair purification discharging;
(3), enter siphunculus by the reducing gases of external-heat reducing gases DRI device and pass into reducing gases to material cooling chamber, reducing gases blows to material cooling chamber, give the cooling of the high-temp solid product DRI after reduction reactions a large amount of in material cooling chamber, reducing gases is in giving the cooling of high-temp solid product DRI, and the temperature that improves reducing gases forms high temperature reduction gas;
(4), high temperature reduction gas enters reduction chamber, and contact with high temperature lump ore or the iron ore pellets material of reduction chamber, carries out tail gas after reduction reaction generation high temperature reduction;
(5), will reduce rear tail gas by reducing rear tail gas passing away importing pre-heating cabin to lump ore or iron ore pellets preheating, it is the preheating of above-mentioned the 1st step, steam after high temperature reduction in tail gas is cooled to water and washes one's hair clarifier through tail gas water and carry out after water is washed one's hair purification discharging through heat exchange, after high temperature reduction, other tail gas is washed one's hair clarifier through tail gas water and carried out after water is washed one's hair purification discharging;
(6), according to lump ore or iron ore pellets reducing degree, control in good time charging valve open or close, lump ore or iron ore pellets are entered by entering stove cloth passage in the reduction chamber of reduction apparatus; Control discharge with endless screw device and open or close, the solid product DRI after lump ore in material cooling chamber or iron ore pellets reduction cooling is entered in sealing finished bin.
Described outer gas-operated thermal bath facility adopts duplex combustion chamber and commutation accumulation of heat heating means, the method relates to equipment and comprises outer gas-operated thermal bath facility, gas reversing arrangement, outer gas-operated thermal bath facility comprises that the first combustion heater of at least one group of identical association of structure, the second combustion heater form, the first described combustion heater mainly comprises that the first combustion chamber, the first coal gas enter arm and the first regenerative heat exchanger, the second combustion heater structure also comprises that the second combustion chamber, the second coal gas enter arm and the second regenerative heat exchanger, and the step of the method is:
(1), air is blasted the first regenerative heat exchanger by gas reversing arrangement, enter heating after the first regenerative heat exchanger heating after, enter in the first combustion chamber, gas reversing arrangement blasts purified gas in the first combustion chamber and burns, waste gas in the first combustion chamber after purified gas burning enters into the second combustion chamber, then is discharged by gas reversing arrangement after the second regenerative heat exchanger heat absorption;
(2), reach and set burning time, air is blasted the second regenerative heat exchanger by gas reversing arrangement, enter heating after the second regenerative heat exchanger heating after, enter in the second combustion chamber, gas reversing arrangement blasts purified gas in the second combustion chamber and burns, waste gas in the second combustion chamber after purified gas burning enters into the first combustion chamber, then is discharged by gas reversing arrangement after the first regenerative heat exchanger heat absorption.
Described interior gas-operated thermal bath facility adopts duplex combustion chamber and commutation accumulation of heat heating means, the method relates to equipment and comprises interior gas-operated thermal bath facility, gas reversing arrangement, interior gas-operated thermal bath facility comprises that the 3rd combustion heater of at least one group of identical association of structure, the 4th combustion heater form, the 3rd described combustion heater mainly comprises that the 3rd combustion chamber, the 3rd coal gas enter arm and the 3rd regenerative heat exchanger, the 4th combustion heater structure also comprises that the 4th combustion chamber, the 4th coal gas enter arm and the 4th regenerative heat exchanger, and the step of the method is:
(1), air is blasted the 3rd regenerative heat exchanger by gas reversing arrangement, enter heating after the 3rd regenerative heat exchanger heating after, enter in the 3rd combustion chamber, gas reversing arrangement blasts purified gas in the 3rd combustion chamber and burns, waste gas in the 3rd combustion chamber after purified gas burning enters into the 4th combustion chamber, then is discharged by gas reversing arrangement after the 4th regenerative heat exchanger heat absorption;
(2), reach and set burning time, air is blasted the 4th regenerative heat exchanger by gas reversing arrangement, enter heating after the 4th regenerative heat exchanger heating after, enter in the 4th combustion chamber, gas reversing arrangement blasts purified gas in the 4th combustion chamber and burns, waste gas in the 4th combustion chamber after purified gas burning enters into the 3rd combustion chamber, then is discharged by gas reversing arrangement after the 3rd regenerative heat exchanger heat absorption.
Reduction of the present invention is independently carried out respectively with reduction heating, is independent of each other, and reducing gases is directly introduced by the external world, and reducing gases introduction volume regulates according to reduction high temperature lump ore or iron ore pellets situation, and reduction efficiency is high, distinguishes the existing self-produced reducing gases mode of production; By utilizing the temperature after lump ore or the reduction of iron ore ball directly to contact and heat reduction gas with reducing gases compared with high solid product, high-temperature tail gas after reduction carries out preheating to the lump ore or the iron ore pellets that enter stove again, do not need to increase independent firing equipment, DRI production cost is minimized, the cleaning that tail gas after preheating and condensed water are washed one's hair purification through water again reaches clean discharge, meets the theory of environmental protection that we advocate now, energy-conservation, sustainable development.
Brief description of the drawings
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is continuous external heating type reducing gases direct-reduction iron furnace schematic diagram of the present invention.
Fig. 2 is gas commutator schematic diagram of the present invention.
Fig. 3 coils schematic diagram on gas commutator of the present invention.
Fig. 4 is gas commutator lower wall schematic diagram of the present invention.
Fig. 5 is A-B place cross-sectional schematic in Fig. 3.
Fig. 6 is gas commutator of the present invention and combustion heater pipe network connection diagram.
Fig. 7 is continuous external heating type reducing gases direct-reduction iron furnace schematic cross-section one of the present invention, that is t-t place schematic cross-section in Fig. 1.
Fig. 8 is continuous external heating type reducing gases direct-reduction iron furnace schematic cross-section two of the present invention, that is u-u place schematic cross-section in Fig. 1.
Fig. 9 is continuous external heating type reducing gases direct-reduction iron furnace schematic cross-section three of the present invention, that is v-v place schematic cross-section in Fig. 1.
Figure 10 is continuous external heating type reducing gases direct-reduction iron furnace schematic cross-section four of the present invention, that is x-x place schematic cross-section in Fig. 1.
Figure 11 is continuous external heating type reducing gases direct-reduction iron furnace schematic cross-section five of the present invention, that is y-y place schematic cross-section in Fig. 1.
Figure 12 is continuous external heating type reducing gases direct-reduction iron furnace stove schematic cross-section six of the present invention, that is z-z place schematic cross-section in Fig. 1.
Figure 13 is industry control central electrical connection diagram of the present invention.
Figure 14 is continuous external heating type reducing gases DRI integration unit composition schematic diagram of the present invention.
Figure 15 is pre-heating cabin cross sectional representation of the present invention, that is b-b place schematic cross-section in Figure 17.
Figure 16 is the cross-sectional schematic of pre-heating cabin of the present invention, that is a-a place schematic cross-section in Figure 17.
Figure 17 is pre-heating cabin schematic diagram of the present invention, that is a-a place schematic cross-section in Figure 17.
To be the tail gas water of the present invention atomized spray of washing one's hair clarifier arrange schematic diagram purifying in cylindrical shell to Figure 18 in the form of a ring, that is d-d place schematic cross-section in Figure 14.
Detailed description of the invention
The specific embodiment that external-heat reducing gases direct-reduction iron furnace of the present invention comprehensively forms technique is mainly being introduced below in detail.
Part I lump ore or the preparation of iron ore pellets raw material
Select 8-30mm lump ore (raw material) by crushing and screening, screenings is processed into the pelletizing (raw material) of the 15mm left and right granularity of not mixing adhesive through high pressure nodulizer, in this particle size range, lump ore or iron ore pellets reduction reaction are more abundant, but this does not form the size restriction of the present invention to needed lump ore or iron ore pellets.
Part II lump ore or iron ore pellets preheating
As shown in Figure 15, Figure 16, Figure 17, Figure 14: pre-heating cabin 1, comprises housing 11, hot gas heat exchanger 13, blanking bin 14, drip pipe 125; In housing 11, be formed for the feed bin 111 of lump ore or iron ore pellets preheating, feed bin 111 relative closures, top is only provided with charging aperture 112, at charging aperture, 112 places are provided with belt conveyor 17, blanking bin 14 is arranged on housing 11 bottoms and communicates with feed bin 111, blanking bin 14 is for temporarily depositing lump ore or the iron ore pellets after preheating, and blanking bin 14 bottoms connect the charging valve 15 with gas sealing function.
As shown in Figure 14, Figure 15, Figure 16, Figure 17, hot gas heat exchanger 13 comprises that high temperature hot gas admission passage 131, high temperature hot gas enter chamber 132, radiating tube 133, radiating tube serial connection passage 134, cryogenic gas discharge chamber 136, 131 times termination drip pipes 125 of high temperature hot gas admission passage, above drip pipe 125, after reduction, tail gas passing away 85 is connected on high temperature hot gas admission passage 131, high temperature hot gas admission passage 131 upper ends enter chamber 132 with high temperature hot gas and communicate, high temperature hot gas enters on the sidewall that chamber 132 is arranged on housing 21, cryogenic gas discharge chamber 136 is arranged on high temperature hot gas and enters on the relative sidewall in chamber 132, cryogenic gas discharge chamber 136 is provided with cryogenic gas passing away 138, the bottom of cryogenic gas discharge chamber 136 is provided with condensed water elimination arm 126, condensed water elimination arm 126 is connected with below drip pipe 125, several radiating tube serial connection passage 134 parallel feed bin 111 inside that are transverse in housing 11 between two, being connected on high temperature hot gas enters between chamber 132 and cryogenic gas discharge chamber 136, one end 1341 of upper radiating tube serial connection passage 134 and high temperature hot gas enter that chamber 132 communicates and the other end 1342 seals, one end 1341 of next radiating tube serial connection passage 134 is sealed and between the other end 1342 and cryogenic gas discharge chamber 136, the rest may be inferred.
As Figure 15, Figure 16, shown in Figure 17, several radiating tubes 133 also adopt metal material to make, several radiating tubes 133 are spaced on radiating tube serial connection passage 134, radiating tube 133 is " U " type, one end is connected on parallel upper radiating tube serial connection passage 134, the other end is connected on parallel next radiating tube serial connection passage 134, parallel between two radiating tube serial connection passage 134 is connected mutually, entering chamber 132 by high temperature hot gas connects with cryogenic gas discharge chamber 136, this example arranges many radiating tubes 133 and radiating tube serial connection passage 134, with the contact area of increase and lump ore or iron ore pellets, improve lump ore or the pre-thermal efficiency of iron ore pellets.
As shown in Figure 17, Figure 16, U-shaped radiating tube 133 is inverted U interval and is connected on radiating tube serial connection passage 134, radiating tube serial connection passage 134 is two rows and arranges, certainly can suitably increase or reduce the quantity of the quantity of U-shaped radiating tube 133 on radiating tube serial connection passage 134 and radiating tube serial connection passage 134 itself, this is the lump ore of preheating or the situation such as amount, humidity and temperature of iron ore pellets and determine as required.
As shown in Figure 17, Figure 16, U-shaped radiating tube 133 is inverted U, and inverted U top is wedge 1331, and this is conducive to being scattered of lump ore or iron ore pellets.
As shown in Figure 13, Figure 14, be placed in one end of belt conveyor 17 by bucket elevator 18, the other end of belt conveyor 17 is placed in charging aperture 112 places, bucket elevator 18, belt conveyor 17 are connected with industry control center 90, are automatically controlled by the work of bucket elevator 18, belt conveyor 17 by industry control center 90.
This routine lump ore or iron ore pellets pre-heating mean are:
(1), as shown in figure 14, by bucket elevator 18, lump ore or iron ore pellets are delivered to belt conveyor 17, belt conveyor 17 is sent to lump ore or iron ore pellets in feed bin 111 from the import 112 of the feed bin 111 of pre-heating cabin 1;
(2), tail gas after high temperature reduction is passed into high temperature hot gas and entered in chamber 132 by reduction tail gas passing away 85, high temperature hot gas admission passage 131 simultaneously, being connected in series passage 134 by radiating tube again flows in radiating tube 133, flow in cryogenic gas discharge chamber 136 by another the adjacent radiating tube serial connection passage 134 being connected with radiating tube 133, last cryogenic gas passing away 138 is discharged again;
(3) the lower coal bunker 14 that, the lump ore after preheating or iron ore pellets finally fall into housing 11 bottoms is temporarily deposited, for lower one reducing gases DRI operation, from and constantly to the feed bin 111 of housing 11, supplement new lump ore or iron ore pellets by bucket elevator 18, belt conveyor 17, realize the continuous dehydration of lump ore or iron ore pellets dry;
(4) after high temperature reduction, the steam in tail gas is cooled to water through hot gas heat exchanger 13 to lump ore or iron ore pellets heat exchange, and condensed water is back to below drip pipe 125 by high temperature hot gas admission passage 131 and condensed water elimination arm 126 and discharges.
This example by high temperature reduction after tail gas the lump ore in feed bin 111 or iron ore pellets are carried out to preheating, both utilized the heat energy of tail gas after high temperature reduction, tail gas discharge temperature after high temperature reduction is minimized again simultaneously, do not need to consume the extra energy, save production cost; After reduction, in tail gas, steam condensed water can discharge again smoothly, can not affect the reduction reaction of reducing gases DRI.
In order to keep the neat and tidy of environment, the tail gas after reduction after tail gas, burning is washed one's hair clarifier 16 purifying and cooling by tail gas water and is processed rear qualified discharge.
As shown in Figure 14, Figure 18, tail gas water is washed one's hair clarifier 16 and is comprised that purification cylindrical shell 161, atomized spray 162, stainless steel filter wire stratum reticulare 163, tank 165, cistern 166, sprinkling water pump 167, tail gas kuppe 164, tail gas enter pipe 169; Purify cylindrical shell 161 tops exhaust port 168 is set, atomized spray 162, stainless steel filtration silk screen 163, tail gas kuppe 164, tank 165 all arrange and purify in cylindrical shell 161; Cistern 166, sprinkling water pump 167 all arrange and purify outside cylindrical shell 161; Tank 165 arranges the bottom that purifies cylindrical shell 161, tank 165 bottoms are provided with spoil disposal pipeline 1650, tail gas kuppe 164 is arranged on the top of tank 165, tail gas kuppe 164 connects tail gas and enters pipe 169, tail gas enters pipe 169 one end and is arranged on the top of tank 165, and tail gas enters pipe 169 other ends and passes and purify cylindrical shell 161 and communicate with the external world; Above tail gas kuppe 164, be provided with stainless steel filter wire stratum reticulare 163, above stainless steel filter wire stratum reticulare 163, atomized spray 162 is set, atomized spray 162 is connected on water inlet pipe 1601, water inlet pipe 1601 stretches out to purify outside cylindrical shell 161 to be connected with water inlet bustle pipe 1602, water inlet bustle pipe 1602 is for purifying around the home cylindrical shell 161 peripheries in the form of a ring, water inlet bustle pipe 1602 is responsible for 160 by water inlet and is joined with sprinkling water pump 167, spray water pump 167 and be connected to suction hose 1603, suction hose 1603 stretches in cistern 166; Cistern 166 also communicates with tank 165 through purifying cylindrical shell 161 by communicating pipe 1604.
As shown in figure 14, offering manhole 1611 near purification cylindrical shell 161 walls above stainless steel filter wire stratum reticulare 163, the one, facilitate workman to enter and purify the interior atomized spray 162 to damage of cylindrical shell 161, stainless steel filter wire stratum reticulare 163 keeps in repair, the 2nd, can be regularly by the artificial plaster of alluvial on stainless steel filter wire stratum reticulare 163 of removing, purification cylindrical shell 161 walls above tank 165 offer water inlet 1612, by water inlet 162 to injecting clean water in tank 165, so that the sewage to dust suction in tank 165 is changed, offering into water overfall 1613 near purification cylindrical shell 161 walls of tank 165 edges, the unnecessary water of tank 165 can be discharged from here, avoid water in tank 165 too many and flood the opening of tail gas kuppe 164, causing tail gas to enter is obstructed.
As Figure 18, shown in Figure 14, for to filtering better dust in tail gas, multiple atomized spray 162 are arranged in the form of a ring purifying in cylindrical shell 161, stretch out to purify outside cylindrical shell 161 by many water inlet pipes 1601 and connect with water inlet bustle pipe 1602, can also many group atomized spray 162 be set purifying in cylindrical shell 161 interval from bottom to top in addition, stainless steel filter wire stratum reticulare 163, and from bottom to top, the order number of stainless steel filter wire stratum reticulare 163 increases gradually, this tail gas water is washed one's hair clarifier 16 and is provided with the atomized spray 162 of 3 groups, stainless steel filter wire stratum reticulare 163, this not only can obtain cleaner tail gas, and can also lower the temperature to hot tail gas.
As shown in figure 13, spray water pump 167 and be connected with industry control center 90, automatically control the work of spraying water pump 167 by industry control center 90.
The Principle Method that this routine tail gas water is washed one's hair purification is:
(1), the tail gas after burning enters pipe 169 by tail gas and enters the tail gas kuppe 164 purifying in cylindrical shell 161, blow to the water surface in the tank 165 of below, the dust that in tail gas, particle is larger, through the absorption of flow surface, sinks to 165 ends of tank in the water of immersion tank and discharges by spoil disposal pipeline 1650;
(2) tail gas, after flow surface absorption upwards filters through stainless steel filter wire stratum reticulare 163, the most of dust of elimination tail gas;
(3), filter through stainless steel filter wire stratum reticulare 163 after tail gas enter again the water smoke layer that atomized spray 162 water sprays form, in tail gas, clean exhaust port 168 qualified discharges by purifying cylindrical shell 161 tops through water smoke layer.
For allow discharge tail gas in dustiness be reduced to minimum, on it, (3) further supplements and is: after filtering through stainless steel filter wire stratum reticulare 163, tail gas enters the water smoke layer that atomized spray 162 forms again, in tail gas, after water smoke layer cleans, upwards entering the stainless steel filter wire stratum reticulare 163 that order number is larger filters again again, the water smoke layer again forming through the larger stainless steel filter wire stratum reticulare 163 top atomized spray 162 of this order number cleans, finally by purifying exhaust port 168 qualified discharges at cylindrical shell 161 tops.
Part III lump ore or iron ore pellets reduction are sent out should
First segment lump ore or iron ore pellets heating
As shown in Figure 1, reduction apparatus 6 is arranged on body of heater 91 middle parts, mainly comprises reduction chamber 61, outer gas-operated thermal bath facility 64, interior gas-operated thermal bath facility 67, gas reversing arrangement 66, center support bow 65, as Fig. 7, Fig. 8, shown in Fig. 9: reduction chamber 61 is by fire-resistant Heat Conduction Material, outer ring wall 612, 611 form an annulus, reduction 61 tops, chamber with enter stove cloth passage 921 and communicate, being centered around the outdoor wall 611 of reduction, to encircle periphery be outer gas-operated thermal bath facility 64, indoor ringwall 612 rings that reduce are interior is interior gas-operated thermal bath facility 67, and wherein outer gas-operated thermal bath facility 64 is mainly first combustion heater 62 of some groups of (9 groups of this examples) identical associations of structure, the second combustion heater 60 forms, as Fig. 1, Fig. 8, shown in Fig. 9: could reduce because lump ore or iron ore pellets need to reach certain temperature, reduction chamber 61 is divided into epimere preheating from top to bottom, heating is continued in stage casing, hypomere is mainly reduction reaction three phases, so reduction chamber 61 height designs are higher, corresponding outer gas-operated thermal bath facility 64 is also mainly divided into, in, lower Three-section type heating, every section of first combustion heater 62 by 9 groups of identical associations of structure, the second combustion heater 60 forms, and interior gas-operated thermal bath facility 67 is mainly divided into, lower two-period form heating, every section by 6 groups of identical the 3rd combustion heaters 68 mutually of structure, the 4th combustion heater 69 forms.
As Fig. 1, Fig. 9 show, the first described combustion heater 62 mainly comprises that the first combustion chamber 621, the first coal gas enter arm 622 and the first regenerative heat exchanger 624, the first coal gas and enters arm 622 and lead in the first combustion chamber 621 through body of heater 91 exterior walls.
As shown in Fig. 1, Fig. 9: body of heater 91 exterior walls that the first combustion chamber 621 is built into by refractory material and fire-resistant Heat Conduction Material are built into reduction outdoor ringwall 611 and outer quirk partition wall 625 and surround the gas-fired quirk of a relative closure.
As shown in Fig. 1, Fig. 9, the first regenerative heat exchanger 624 comprises that the first accumulation of heat chamber 626, the first heat storage 623, the first air enter arm 627 and the first burnt gas exhaust outlet 628; The first accumulation of heat chamber 626 is arranged in body of heater 91 exterior walls, the first heat storage 623 arranges in the first accumulation of heat chamber 626,621 bottoms, the first combustion chamber are led in the first 626 one end, accumulation of heat chamber, and the other end is connected to respectively the first air and enters arm 627 and the first burnt gas exhaust outlet 628.
As shown in Figure 9, enter and between arm 627 and the first accumulation of heat chamber 626, be provided with the first one-way air valve 629, the first one-way air valves 629 and allow air to enter pipe 627 and the first accumulation of heat chamber 626 flows into the first combustion chamber 621 from the first air at the first air; Between the first burnt gas exhaust outlet 628 and the first accumulation of heat chamber 626, be provided with the first unidirectional waste gas valve 620, the first unidirectional waste gas valve 620 allows the gas-fired waste gas first accumulation of heat chamber 626 of flowing through from the first combustion chamber 621, finally discharge (certainly from the first burnt gas exhaust outlet 628, adopt gas reversing arrangement 66 as described below, when air supervisor 667 is in charge of 6671 connections with the first air, air supervisor 667 and the second air are in charge of 6673 in cut-out; Meanwhile, burnt gas supervisor 669 is in charge of 6691 with the first burnt gas and also cuts off mutually, and corresponding burnt gas supervisor 669 and the second burnt gas are in charge of 6693 in being connected, can play the effect that replaces the first one-way air valve 629 and the first unidirectional waste gas valve 620).
In like manner, as shown in Figure 9: identical the second combustion heater 60 of structure mainly comprises that the second combustion chamber 601, the second coal gas enter arm 602 and the second regenerative heat exchanger 604.
As shown in Figure 9: body of heater 91 exterior walls that the second combustion chamber 601 is built into by refractory material and fire-resistant Heat Conduction Material are built into reduction outdoor ringwall 611 and outer quirk partition wall 625 and surround the gas-fired quirk of a relative closure.
As shown in Fig. 1, Fig. 9: the second coal gas enters arm 602 and leads in the second combustion chamber 601 through body of heater 91 exterior walls.
As shown in Figure 9: the second regenerative heat exchanger 604 comprises the second accumulation of heat chamber 606, the second heat storage 603, the second air enters arm 607 and the second burnt gas exhaust outlet 608, the second accumulation of heat chamber 606 is arranged in body of heater 91 exterior walls, the second heat storage 603 arranges in the second accumulation of heat chamber 606, 601 bottoms, the second combustion chamber are led in the second 606 one end, accumulation of heat chamber, the other end is connected to respectively the second air and enters arm 607 and the second burnt gas exhaust outlet 608, enter between arm 607 and the second accumulation of heat chamber 606 and be provided with the second one-way air valve 609 at the second air, the second one-way air valve 609 allow air from the second air enter pipe 607 and second accumulation of heat chamber 606 flow into the second combustion chamber 601, between the second burnt gas exhaust outlet 608 and the second accumulation of heat chamber 606, be provided with the second unidirectional waste gas valve 600, the second unidirectional waste gas valve 600 allows the gas-fired waste gas second accumulation of heat chamber 606 of flowing through from the second combustion chamber 601, finally discharge (certainly from the second burnt gas exhaust outlet 608, adopt gas reversing arrangement 66 as described below, when air supervisor 667 and the first air are in charge of 6671 cut-outs, air supervisor 667 and the second air are in charge of 6673 in connecting, meanwhile, burnt gas supervisor 669 and the first burnt gas are in charge of 6691 and are also connected, and corresponding burnt gas supervisor 669 is in charge of 6693 also cut-outs mutually with the second burnt gas, can play the effect that replaces the second one-way air valve 609 and the second unidirectional waste gas valve 600).
As shown in Fig. 1, Fig. 8, between the second combustion chamber 601 of the first combustion chamber 621 and next-door neighbour, the top of outer quirk partition wall 625 is provided with combustion chamber through hole 6251, combustion chamber through hole 6251 is connected the first combustion chamber 621 to form associated one group with the second combustion chamber 601 of next-door neighbour, this example China and foreign countries gas-operated thermal bath facility 64 is provided with quirk partition wall 625 outside 18 roads altogether, forms 9 groups of associated burning groups; In addition, as shown in Figure 1; Because reduction chamber 61 is highly higher, wherein outer gas-operated thermal bath facility 64 is mainly divided into upper, middle and lower segment formula and heats, and every section by 9 groups of structures, identical and associated the first combustion heater 62, the second combustion heater 60 form.
As shown in Figure 1: on body of heater 91 exterior walls, each combustion chamber is also provided with chamber temperature monitoring holes 6201 and combustion chamber peephole 6202, combustion chamber peephole 6202 is convenient to the directly gas-fired situation of the each combustion chamber of observation of technical staff, in chamber temperature monitoring holes 6201, be provided with chamber temperature table 6203 for the temperature monitoring to combustion chamber, so that the assessment to lump ore or iron ore pellets process.
As Figure 13 shows: chamber temperature table 6203 is connected with industry control center 90, automatically gathered the temperature data of chamber temperature table 6203 by industry control center 90.
As Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, gas reversing arrangement 66 comprises dish 661, lower wall 662, rotation reversing motor 663, air blower 664, gas fan 665, exhaust gas fan 666, lower wall 662 is connected to respectively an air supervisor 667 and the first air is in charge of 6671, the second air is in charge of 6673, coal gas supervisor 668 and the first gas manifold 6681, the second gas manifold 6683, burnt gas supervisor 669 and the second burnt gas are in charge of 6693, the first burnt gas is in charge of 6691, wherein, the second burnt gas be in charge of 6693 and first burnt gas be in charge of 6691 and first air be in charge of 6671 and second air be in charge of 6673 and the setting of first gas manifold 6681 and the second gas manifold 6683 just exchange (Fig. 2, Fig. 4, shown in Fig. 6).
As Fig. 3, Fig. 4, Fig. 5, shown in Fig. 6: above coil 661 and be fitted in lower wall 662 tops, upper dish 661 respectively correspondence is provided with air tube connector 6672, coal gas tube connector 6682, burnt gas tube connector 6692, thereby rotation reversing motor 663 drive upper dish 661 reciprocating rotation on lower wall 662 realize air supervisor 667 constantly with the first air be in charge of 6671 and second air be in charge of 6673 and connect and cut off conversion, coal gas supervisor 668 constantly connects and cuts off conversion with the first gas manifold 6681 and the second gas manifold 6683, burnt gas supervisor 669 constantly with the second burnt gas be in charge of 6693 and first burnt gas be in charge of 6691 connect and cut off conversion (with the first air be in charge of 6671 and second air be in charge of 6673 and the switching of first gas manifold 6681 and the second gas manifold 6683 just contrary).
As shown in Fig. 1, Fig. 6, be also provided with two groups of bustle pipes in the periphery of body of heater 91, comprise the first air bustle pipe 6674, the first coal gas bustle pipe 6684, the first burnt gas bustle pipes 6694; The second air bustle pipe 6675, the second coal gas bustle pipe 6685, the second burnt gas bustle pipes 6695.
As shown in Fig. 1, Fig. 6, the first air bustle pipe 6674 by the first air be in charge of 6671 and first air enter arm 627 and couple together, by the first air be in charge of 6671, the first air bustle pipe 6674, the first air enter arm 627, the first accumulation of heat chamber 626 and the first combustion chamber 621 and form same path;
Meanwhile, the first coal gas bustle pipe 6684 enters arm 622 by the first gas manifold 6681 and the first coal gas and couples together, by the first gas manifold 6681, the first coal gas bustle pipe 6684, the first coal gas enters arm 622 and the first combustion chamber 621 forms same path;
Simultaneously now, the first burnt gas bustle pipe 6694 be by the first burnt gas be in charge of 6691 and first burnt gas exhaust outlet 628 couple together, by the first burnt gas be in charge of 6691, the first burnt gas bustle pipe 6694, the first burnt gas exhaust outlet 628, the first accumulation of heat chamber 626 form same path with combustion chamber 621.
In like manner, the second air bustle pipe 6675 by the second air be in charge of 6673 and second air enter arm 607 and couple together, by the second air be in charge of 6673, the second air bustle pipe 6675, the second air enter arm 607, the second accumulation of heat chamber 606 and the second combustion chamber 601 and form same path;
Meanwhile, the second coal gas bustle pipe 6685 enters arm 602 by the second gas manifold 6683 and the second coal gas and couples together, by the second gas manifold 6683, the second coal gas bustle pipe 6685, the second coal gas enters arm 602 and the second combustion chamber 601 forms same path;
Meanwhile, the second burnt gas bustle pipe 6695 by the second combustion gas be in charge of 6693 and second burnt gas exhaust outlet 608 couple together, by the second burnt gas be in charge of 6693, the second burnt gas bustle pipe 6695, the second burnt gas exhaust outlet 608, the second accumulation of heat chamber 606 and the second combustion chamber 601 form same path.
In addition, exhaust gas fan 666 enters pipe by pipeline 6661 and tail gas and 169 is connected, thereby the tail gas kuppe 164 of washing one's hair clarifier 16 with tail gas water communicates; Shown in Figure 13; this example also comprises that gas reversing arrangement controller 906 is for controlling rotation reversing motor 663, air blower 664, gas fan 665, exhaust gas fan 666; gas reversing arrangement electric controller 906 is connected with upper industry control center 90 again; certainly from electric control theory; in this example, rotate reversing motor 663, air blower 664, gas fan 665, exhaust gas fan 666 and controlled by industry control center 90, so the restriction that gas reversing arrangement controller 906 does not form this routine protection domain is set herein.
Shown in as shown in Figure 1, Figure 2~Fig. 5, Fig. 6, Figure 13: the heating means of this outer gas-operated thermal bath facility 64 are:
(1) industry control center 90 startup rotation reversing motors 663 drive the rotation on lower wall 662 of upper dish 661, and air supervisor 667 and the first air are in charge of 6671 connections, and air supervisor 667 and the second air are in charge of 6673 in dissengaged positions; Meanwhile, coal gas supervisor 668 and the first gas manifold 6681 are also connected, and coal gas supervisor 668 and the second gas manifold 6683 are in dissengaged positions; Meanwhile, burnt gas supervisor 669 is in charge of 6691 with the first burnt gas and also cuts off mutually, and corresponding burnt gas supervisor 669 and the second burnt gas are in charge of 6693 in the state of being connected;
(2) industry control center 90 starts air blower 664, gas fan 665, exhaust gas fan 666, air blower 664 by air blast air supervisor 667, air enter successively through air tube connector 6672, the first air be in charge of 6671, the first air bustle pipe 6674, the first air enter arm 627 and enter into the first accumulation of heat chamber 626, enter in the first combustion chamber 621 after utilizing heat that the first heat storage 623 discharges to heat air, simultaneously, purified gas is blasted coal gas supervisor 668 by gas fan 665, coal gas enters coal gas tube connector 6682 successively, the first gas manifold 6681, the first coal gas bustle pipe 6684, the first coal gas enters arm 622 and enters in the first combustion chamber 621 and burn, meanwhile, because burnt gas supervisor 669 is in charge of 6691 in phase dissengaged positions with the first burnt gas, and corresponding burnt gas supervisor 669 and the second burnt gas are in charge of 6693 in the state of being connected, so the waste gas in the first combustion chamber 621 after gas-fired can only enter into the second combustion chamber 601 by the combustion chamber through hole 6251 on outer quirk partition wall 625 tops, again through in the second accumulation of heat chamber 606, after the second heat storage 603 in the second accumulation of heat chamber 606 carries out absorbing and cooling temperature from the second burnt gas exhaust outlet 608, the second burnt gas bustle pipe 6695, the second burnt gas is in charge of 6693, burnt gas tube connector 6692, burnt gas supervisor 669 discharges by exhaust gas fan 666,
(3) reach and set burning time, industry control center 90 starts rotation reversing motor 663 and drives upper dish 661 to rotate backward on lower wall 662, air supervisor 667 and the first air are in charge of 6671 cut-outs, air supervisor 667 and the second air are in charge of 6673 in on-state, simultaneously, coal gas supervisor 668 also cuts off mutually with the first gas manifold 6681, coal gas supervisor 668 and the second gas manifold 6683 on-states, meanwhile, burnt gas supervisor 669 and the first burnt gas are in charge of 6691 and are also connected, and corresponding burnt gas supervisor 669 and the second burnt gas are in charge of 6693 also phase dissengaged positions,
(4) air blower 664 by air blast air supervisor 667, air enter successively through air tube connector 6672, the second air be in charge of 6673, the second air bustle pipe 6675, the second air enter arm 607 and enter into the second accumulation of heat chamber 606, after the heat that utilizes the second heat storage 603 in the second accumulation of heat chamber 606 to discharge heats air, enter in the second combustion chamber 601, simultaneously, purified gas is blasted coal gas supervisor 668 by gas fan 665, coal gas enters coal gas tube connector 6682 successively, the second gas manifold 6683, the second coal gas bustle pipe 6685, the second coal gas enters arm 602 and enters in the second combustion chamber 601 and burn, meanwhile, because burnt gas supervisor 669 and the first burnt gas are in charge of 6691 and are connected, and corresponding burnt gas supervisor 669 and the second burnt gas are in charge of 6693 in phase dissengaged positions, so the waste gas in the second combustion chamber 601 after gas-fired can only enter in the first combustion chamber 621 by the combustion chamber through hole 6251 on outer quirk partition wall 625 tops, again through the first accumulation of heat chamber 626, the first heat storage 603 in the first accumulation of heat chamber 626 carries out after absorbing and cooling temperature, finally from the first burnt gas exhaust outlet 628, the first burnt gas bustle pipe 6694, the first burnt gas is in charge of 6691, burnt gas supervisor 669 discharges by exhaust gas fan 666, so outer gas-operated thermal bath facility 64 theories of combustion are to enter the second combustion chamber 601 when the waste gas generating after gas-fired in the first combustion chamber 621 from combustion chamber through hole 6251, after the second heat storage 603 in the second combustion chamber 601 and the second accumulation of heat chamber 606 is to its exhaust-heat absorption cooling, discharge, otherwise, when the waste gas generating after gas-fired in the second combustion chamber 601 enters the first combustion chamber 621 from combustion chamber through hole 6251, after the first heat storage 603 in the first combustion chamber 621 and the first accumulation of heat chamber 606 is to its exhaust-heat absorption cooling, discharge.
Further: the waste gas after purified gas burning by exhaust gas fan 666 enter tail gas water wash one's hair in clarifier 16, carry out water wash one's hair purify after clean discharge.
In sum, this gas two by gas reversing arrangement enters the working method of the regenerative heat exchange of a working method outing and regenerative heat exchanger, realize the combustion heater alternate combustion of two groups of associations, be that gas reversing arrangement is sent into air, purified gas burning to the combustion chamber of the first combustion heater, the hot waste gas after sucking-off burning from the combustion chamber of the second combustion heater simultaneously, the second heat storage absorbing and cooling temperature of hot waste gas in the second regenerative heat exchanger of the second combustion heater becomes the relatively low low temperature waste gas of temperature and discharges; In like manner, gas reversing arrangement is sent into air, purified gas burning to the combustion chamber of the second combustion heater, the hot waste gas after sucking-off burning from the combustion chamber of the first combustion heater simultaneously, the first heat storage absorbing and cooling temperature of hot waste gas in the first regenerative heat exchanger of the first combustion heater becomes the relatively low low temperature waste gas of temperature and discharges; This method of mutually utilizing waste gas residual heat after gas-fired to add hot-air, both played the waste gas residual heat after gas-fired had been made full use of, improve the efficiency of combustion of the coal gas in combustion chamber, can carry out cooling to a certain degree to the waste gas after gas-fired again, need not consume the external energy, play energy-saving and cost-reducing object, save lump ore or iron ore pellets reduction cost, waste gas after gas-fired can totally discharge again, carves and current environmental requirement.
Heating by external gas-operated thermal bath facility 64 is controlled automatically, reduces human cost, has improved the control accuracy to lump ore or iron ore pellets process, realizes automation.
As Fig. 1, Figure 10, shown in Figure 11, interior gas-operated thermal bath facility 67 is mainly by some groups of (6 groups of this examples) combustion heaters 68 that structure is identical, 69, because reduction chamber 61 is highly higher, interior gas-operated thermal bath facility 67 is mainly divided into, lower two-period form heating, every section has 6 groups of association the 3rd combustion heaters 68 that structure is identical, the 4th combustion heater 69, it forms structure and associated first burning heater 62 of the theory of combustion with above introduction, the second burning heater 60 is almost identical, the 3rd combustion heater 68 also comprises the 3rd combustion chamber 681, the 3rd coal gas enters arm 682, the 3rd accumulation of heat chamber 686, the 3rd heat storage 683, the 3rd air enters arm 687 and the 3rd burnt gas exhaust outlet 688.
As shown in Fig. 1, Fig. 9, Figure 11, the 3rd combustion chamber 681 is built into reduction indoor ringwall 612 and internal-quirk partition wall 635 and is surrounded the gas-fired quirk of a relative closure by fire-resistant Heat Conduction Material.
As shown in Figure 1, Figure 10 shows, the 3rd coal gas of hypomere enters arm 682 and upwards leads to three combustion chamber 681 from the passing of article bow 651 of center support bow 65 below, the 3rd accumulation of heat chamber 686 is arranged on article body of heater that bends 651 belows 91, the 3rd heat storage 683 is placed in the 3rd accumulation of heat chamber 686, the 3rd 686 one end, accumulation of heat chamber by extend passage 6861 from article bow 651 of center support bow 65 lead to 681 bottoms, the 3rd combustion chamber through extension upwards below, the 3rd accumulation of heat chamber 686 other ends are connected to respectively the 3rd air and enter arm 687 and the 3rd burnt gas exhaust outlet 688.
As Fig. 1, Fig. 9, shown in Figure 10, the 3rd coal gas of epimere enters arm 682 passing and upwards leading to the 3rd combustion chamber 681 through quirk partition wall 635 from article bow 651 of center support bow 65 below, the 3rd accumulation of heat chamber 686 is arranged on article body of heater that bends 651 belows 91, the 3rd heat storage 683 is placed in the 3rd accumulation of heat chamber 686, the 3rd 686 one end, accumulation of heat chamber by extend passage 6861 from article bow 651 of center support bow 65 below through upwards leading to 681 bottoms, the 3rd combustion chamber through 635 extensions of quirk partition wall, the 3rd accumulation of heat chamber 686 other ends are connected to respectively the 3rd air and enter arm 687 and the 3rd burnt gas exhaust outlet 688.
In like manner, as shown in Fig. 9, Figure 10, Figure 11, the 4th combustion heater 69 structures are complete identical with the 3rd combustion heater 68, repeat no more here, wherein the 4th combustion chamber 691 is connected and is formed associated one group by chamber passage 6305 with the 3rd combustion chamber 681, as shown in Fig. 1, Fig. 8.
Wherein, as shown in Fig. 1, Fig. 6, Figure 10, the 3rd coal gas of the 3rd combustion chamber 681 of the 3rd burning heater 68 enter arm 682, the 3rd air enter arm 687 and the 3rd burnt gas exhaust outlet 688 respectively by the first coal gas bustle pipe 6684, the first air bustle pipe 6674, the first burnt gas bustle pipes 6694 and the first gas manifold 6681, the first air be in charge of 6671, the first burnt gas is in charge of 6691 and communicates.
As shown in Fig. 6, Figure 10, the 4th coal gas of the 4th combustion chamber 691 of the 4th burning heater 69 enter arm 692, the 4th air enter arm 697 and the 4th burnt gas exhaust outlet 698 respectively by the second coal gas bustle pipe 6685, the second air bustle pipe 6675, the second burnt gas bustle pipe 6695 and the second gas manifold 6683, the second air be in charge of 6673, the second burnt gas is in charge of 6693 and communicates.
Here, the 3rd burning heater 68, the 4th combustion heater 69 theories of combustion and above the first burning heater 62, the second burning heater 60 are almost identical, repeat no more.
As shown in Figure 1, Figure 10 shows, center support bow 65, because the quirk partition wall 635 of indoor ringwall 612 and interior burning heater 67 of reducing is all arranged in furnace chamber, need center support bow 65 for it provides support, the laying of various pipelines is provided to interior burning heater 67 again simultaneously.
As shown in Figure 1, Figure 10 shows, center support bow 65 is arranged in the furnace chamber of reduction chamber 61, interior burning heater 67 belows, mainly comprise bar bow 651, the Huo Gong center ringwall 652 of some, bar bends 651 one end and is fixed on Huo Gong center ringwall 652, the other end is fixed on body of heater 91, bar bow 651 is the radial layout of scattering in interval at a certain angle around ringwall 652 centers, Huo Gong center, fire bow 651 in this example is 12 bows, and quantity is consistent with the 3rd burning heater 68 the 4th burning heater 69 sums that are mutually related of interior burning heater 67.
As shown in Fig. 1, Figure 10, Fig. 9, Figure 11, article one, in the body of wall of fire bow 651, the 3rd coal gas is set and enters the extension passage 6861 in arm 682 and the 3rd accumulation of heat chamber 686, the 4th coal gas arranging in the body of wall of tight another article of adjacent fire bow 651 enters the extension passage 6961 in arm 692 and the 4th accumulation of heat chamber 696, provide convenience to the pipe laying of interior burning heater 67, make the various conduit arrangements of interior burning heater 67 orderly, be unlikely to interfere.
In sum, the mode of heating of reduction apparatus 6 is by outer gas-operated thermal bath facility 64, interior gas-operated thermal bath facility 67 adopts duplex combustion chamber and commutation heating, on 64 points of outer gas-operated thermal bath facilities, in, lower three sections of heating, on 67 points of interior gas-operated thermal bath facilities, lower two sections of heating, in reduction chamber 61, provide thermal source, in addition, in reduction, chamber 61 is indoor carries out separately for the reduction reaction of this reduction apparatus 6, and reduction heating is separately in reduction, chamber 61 is outdoor carries out, therefore be referred to as external-heat, be different from the mode that existing self-produced reducing gases is produced DRI, reduction reaction and reduction reaction are heated respectively can be continuous, controlled carrying out, mutually coordinate and don't restriction mutually, impact.
Second section reduction reaction
Because lump ore or iron ore pellets temperature in reduction chamber is higher, pass into reducing gases to again lump ore or iron ore pellets, reducing gases can be natural gas or manufacture reducing gases or with coke-stove gas (COG) with coal, converter gas and (or) blast furnace (BF) stock gas, the present invention mainly utilizes charcoal in low rank coal high temperature product smokeless char and superheated vapour to meet to carry out water gas reaction water-gas product, this water-gas product main component is H2, CO, wherein hydrogen content is high, carbon monoxide and hydrogen reasonable mixture ratio, other component content is low, it is desirable reducing gases product, also can obtain pure hydrogen as reducing gases by pressure-variable adsorption or membrane separation process.
As shown in Fig. 1, Figure 12, external-heat reducing gases DRI device 7 comprises that reduction apparatus 6, material cooling chamber 70, reducing gases enter siphunculus 707.
As shown in Figure 1, the reduction chamber 61 of reduction apparatus 6 is positioned at center support and bends 65 tops, outer gas-operated thermal bath facility 64, interior gas-operated thermal bath facility 67 is placed in respectively outside the outer ring wall 611 of reduction chamber 61, in interior ringwall 612, outer gas-operated thermal bath facility 64, interior gas-operated thermal bath facility 67 purified gas burn provides required thermal source to reduction chamber 61, therefore be referred to as external-heat, certainly, if reduction chamber 61 is used to other external heating device, inner heating device is also feasible, as long as can ensure required heat and the temperature of reduction to reduction chamber 61, be not limited to above-mentioned outer gas-operated thermal bath facility 64, the mode of heating of interior gas-operated thermal bath facility 67.
As shown in Figure 1, material cooling chamber 70 is arranged on body of heater 91 bottoms and is positioned at center support and bends 65 belows, and the top of material cooling chamber 70 communicates with reduction 61 bottoms, chamber; Reducing gases enters siphunculus 707 one end and leads to the top of material cooling chamber 70, and reducing gases enters the opening 708 of siphunculus 707 downwards towards material cooling chamber 70, and the other end that reducing gases enters siphunculus 707 stretches out outside body of heater 91 for external reducing gases.
Reduction reaction Principle Method of the present invention is:
(1), enter siphunculus 707 by reducing gases and pass into reducing gases to material cooling chamber 70, reducing gases blows to material cooling chamber 70, give the cooling of the high-temp solid product DRI after reduction reactions a large amount of in material cooling chamber 70, reducing gases, in giving the cooling of high-temp solid product DRI, improves reducing gases temperature and forms high temperature reduction gas;
(2), high temperature reduction gas enters reduction chamber 61 through center support bow 65, and contact with high temperature lump ore or the iron ore pellets material of reduction chamber 61, carries out tail gas after reduction reaction generation high temperature reduction;
(3), above-mentioned the 2nd step, the heating of reduction chamber 61 adopts duplex combustion chamber and commutation accumulation of heat heating by outer gas-operated thermal bath facility 64, interior gas-operated thermal bath facility 67,64 points of upper, middle and lower segment heating of outer gas-operated thermal bath facility, 67 points of upper and lower two sections of heating of interior gas-operated thermal bath facility, provide institute's calorific requirement to reduction reaction.
It is that charcoal in low rank coal high temperature product smokeless char and superheated vapour meet and carry out the water-gas of water gas reaction generation that the present invention utilizes reducing gases master, it is heated when the high-temp solid product DRI of water-gas after to reduction reaction carries out air cooling cooling, do not need additionally to increase the firing equipment of reducing gases, do not need independent cooling system yet, save energy consumption, production cost is minimized.
Section three, after reduction, tail gas is derived
After the reduction of the generation after reducing gases DRI, tail gas is mainly steam and carbon dioxide, and after reduction, the temperature of tail gas is higher, needs to derive to utilize.
As shown in Fig. 1, Fig. 7, Figure 14, after reduction, tail gas passing away 85 arranges in the exterior wall of body of heater 91, communicates with the top of reduction chamber 61; As shown in Figure 7, after 4 reduction, tail gas passing away 85 arranges in the exterior wall of body of heater 91, and after reduction, the entrance 851 of tail gas passing away 85 leads to reduction chamber 61 through outer ring wall 611 middle parts, and after reduction, the exterior wall of body of heater 91 is stretched out in the outlet 852 of tail gas passing away 85.
This routine feature derives tail gas after the reduction after reduction reaction in reduction chamber 61 smoothly from the top of reduction chamber 61.
Section four, continuous external heating type reducing gases DRI
Comprehensively above-mentioned, this routine feature is tail gas guide after lump ore or iron ore pellets preheating, reduction reaction, reduction to be gone out to technique be incorporated in same body of heater, makes lump ore or iron ore pellets reduction reaction be able to continuous realization.
As shown in figure 14, continuous external heating type reducing gases direct-reduction iron furnace 9 comprise body of heater 91, pre-heating cabin 1, enter stove cloth passage 921, tail gas passing away 85, discharge with endless screw device 96, sealing finished bin 94 after external-heat reducing gases DRI device 7, reduction; After pre-heating cabin 1, external-heat reducing gases DRI device 7, reduction, the concrete structure of tail gas passing away 85 is shown in the above; Pre-heating cabin 1 is arranged on body of heater 91 tops, the high temperature hot gas admission passage 131 of pre-heating cabin 1 communicates with tail gas passing away 85 after reduction, body of heater 91 tops are provided with into stove cloth passage 921, entering stove cloth passage 921 upper ends communicates with pre-heating cabin 1 bottom, enter stove cloth passage 921 lower ends and communicate with 61 tops, reduction chamber of reduction apparatus 6, enter stove cloth passage 921 upper ends and be connected with the charging valve 15 of blanking bin 14 bottoms of pre-heating cabin 1.
As shown in figure 14, discharge with endless screw device 96 is arranged on material cooling chamber 70 bottoms of external-heat reducing gases DRI device 7, sealing finished bin 94 is placed in body of heater 91 bottoms, in sealing finished bin 94, connect discharge with endless screw device 96, discharge with endless screw device 96 belongs to prior art, as the removal device on market, material returning device, blanking device etc.
The method of this routine continuous external heating type reducing gases DRI is:
(1), by bucket elevator 18, lump ore or iron ore pellets are delivered to belt conveyor 17, belt conveyor 17 preheating from pre-heating cabin 1 by lump ore or iron ore pellets, then enter by entering stove cloth passage 921 in the reduction chamber 61 of reduction apparatus 6;
(2) outer gas-operated thermal bath facility 64, the interior gas-operated thermal bath facility 67 of the reduction apparatus 6, by external-heat reducing gases DRI device 7 provide thermal source to purifying rear gas-fired to reduction chamber 61, and lump ore or iron ore pellets reduce under hot environment in reduction chamber 61;
(3), enter siphunculus 707 by reducing gases and pass into reducing gases to material cooling chamber 70, reducing gases blows to material cooling chamber 70, give the cooling of the high-temp solid product DRI after reduction reactions a large amount of in material cooling chamber 70, reducing gases is in giving the cooling of high-temp solid product DRI, and the temperature that improves reducing gases forms high temperature reduction gas;
(4), high temperature reduction gas enters reduction chamber 61 through center support bow 65, and contact with high temperature lump ore or the iron ore pellets material of reduction chamber 61, carries out tail gas after reduction reaction generation high temperature reduction;
(5), tail gas after reduction is imported to high temperature hot gas admission passage 131 and enters pre-heating cabin 1 to lump ore or iron ore pellets preheating by reducing rear tail gas passing away 85, it is the preheating of above-mentioned the 1st step, steam after high temperature reduction in tail gas is cooled to water through hot gas heat exchanger 13 to lump ore or iron ore pellets heat exchange, and condensed water is back to below drip pipe 125 by high temperature hot gas admission passage 131 and condensed water elimination arm 126 and discharges;
(6), according to lump ore or iron ore pellets reducing degree, control charging valve 15 in good time and open or close, lump ore or iron ore pellets are entered by entering stove cloth passage 921 in the reduction chamber 61 of reduction apparatus 6; Control discharge with endless screw device 96 and open or close, the solid product DRI after lump ore in material cooling chamber 70 or iron ore pellets reduction cooling is entered in sealing finished bin 94.
Lump ore or iron ore pellets preheating, heating, reducing process are incorporated into same body of heater by this example, realizes continuous lump ore or iron ore pellets reduction, and production efficiency is high, and the required factory building face of equipment is little, and human cost is low, has the feature of low consumption, environmental protection.
Part IV continuous external heating type reducing gases DRI is comprehensive
First segment continuous external heating type reducing gases DRI integration unit
As shown in figure 14, comprehensively above-mentioned, draw continuous external heating type reducing gases DRI integration unit, comprise that continuous external heating type reducing gases direct-reduction iron furnace 9, tail gas water washes one's hair clarifier 16, the exhaust gas fan 666 of the gas reversing arrangement 66 of the reduction apparatus 6 of continuous external heating type reducing gases direct-reduction iron furnace 9 enters pipe by pipeline 6661 and tail gas and 169 is connected, thereby the tail gas kuppe 164 of washing one's hair clarifier 16 with tail gas water communicates; The drip pipe 125 of the pre-heating cabin 1 of continuous external heating type reducing gases direct-reduction iron furnace 9 is discharged tube connector 1381 by condensed water elimination tube connector 1251 and cryogenic gas passing away 138 by cryogenic gas, jointly stretching into tail gas water washes one's hair in the purification cylindrical shell 161 of clarifier 16, cryogenic gas is discharged the outlet of tube connector 1381 and is positioned at the below of atomized spray 162, stainless steel filter wire stratum reticulare 163, to reducing the emission abatement of rear tail gas.
So draw, continuous external heating type reducing gases DRI integrated approach is: further supplement in the 2nd step of the method for above-mentioned continuous external heating type reducing gases DRI and be, above-mentioned outer gas-operated thermal bath facility 64, interior gas-operated thermal bath facility 67 adopts duplex combustion chamber and commutation heating, provide thermal source to reduction in chamber 61, the waste gas in outer gas-operated thermal bath facility 64, interior gas-operated thermal bath facility 67 after purified gas burning by exhaust gas fan 666 enter tail gas water wash one's hair in clarifier 16, carry out water wash one's hair purify after clean discharge, further supplement in the 5th step of the method for above-mentioned continuous external heating type reducing gases DRI and be, tail gas after reduction is derived to high temperature hot gas admission passage 131 and entered pre-heating cabin 1 to lump ore or iron ore pellets preheating by reducing rear tail gas passing away 85, it is the preheating of above-mentioned the 1st step, steam after high temperature reduction in tail gas through hot gas heat exchanger 13 to lump ore or iron ore pellets heat exchange and be cooled to water, condensed water is back to below drip pipe 125 by high temperature hot gas admission passage 131 and condensed water elimination arm 126, entering tail gas water by condensed water elimination tube connector 1251 washes one's hair in the tank 165 of clarifier 16, reduction tail gas is discharged tube connector 1381 by cryogenic gas and is flowed into tail gas water and wash one's hair in the purification cylindrical shell 161 of clarifier 16, through reaching clean discharge after the water smoke layer cleaning through atomized spray 162 and 163 filtrations of stainless steel filter wire stratum reticulare, protection of the environment.
Be further refined as: 64 points of upper, middle and lower segment heating of outer gas-operated thermal bath facility, 67 points of upper and lower two sections of heating of interior gas-operated thermal bath facility provide thermal source in reduction chamber 61.
The control of the comprehensive composite technology of second section continuous external heating type reducing gases DRI
As shown in figure 13: the control device of continuous external heating type reducing gases DRI integration unit, comprise that bucket elevator 18, belt conveyor 17, charging valve 15, discharge with endless screw device 96, chamber temperature table 6203, rotation reversing motor 663, air blower 664, gas fan 665, exhaust gas fan 666, sprinkling water pump 167 that industry control center 90 and lump ore or the pre-hot feed of iron ore pellets are used are connected, and are controlled their work automatically by industry control center 90.
The control method of continuous external heating type reducing gases DRI integration unit is:
(1), industry control center 90 is controlled to the lump ore or the iron ore pellets pellet that add in the feed bin 111 of pre-heating cabin 1 by bucket elevator 18, infeed belt conveyor 17, control again charging valve 15 and open or close, thereby control the lump ore after preheating in blanking bin 14 or iron ore pellets enter the reduction chamber 61 of reduction apparatus 6 furnace entering volume by entering stove cloth passage 921;
(2) temperature that, industry control center 90 records according to chamber temperature table 6203 is carried out rotational frequency and air blower 664, gas fan 665, the external gas-operated thermal bath facility 64 of air force of exhaust gas fan 666, the gas-fired of interior gas-operated thermal bath facility 67 of comprehensive assessment lump ore or iron ore pellets reduction situation control rotation reversing motor 663 and is controlled, thereby lump ore or iron ore pellets reduction reaction are adjusted;
(3) water that, industry control center 90 pumps into tail gas by exhaust gas fan 666 by the waste gas after burning in outer gas-operated thermal bath facility 64, interior gas-operated thermal bath facility 67 is washed one's hair in clarifier 16 and is purified;
(4), the pump water yield of industry control center 90 adjustment sprinkling water pumps 167 realizes the purification that the waste gas after burning is pumped into tail gas, the rear tail gas of reduction.
Above content introduction just exemplifies a tool embodiment of continuous external heating type reducing gases DRI integration unit and technique, does not form the restriction to this case continuous external heating type reducing gases DRI integration unit and technique protection domain.

Claims (3)

1. continuous external heating type reducing gases DRI integrated approach, is characterized in that: the method relates to equipment and comprises that continuous external heating type reducing gases direct-reduction iron furnace, tail gas water washes one's hair clarifier; Described continuous external heating type reducing gases direct-reduction iron furnace comprises body of heater, pre-heating cabin, enters stove cloth passage, tail gas passing away, discharge with endless screw device, sealing finished bin after external-heat reducing gases DRI device, reduction; Step is:
(1), by lump ore or iron ore pellets are sent into preheating in pre-heating cabin, then enter by entering stove cloth passage in the reduction chamber of reduction apparatus of external-heat reducing gases DRI device;
(2), the outer gas-operated thermal bath facility of the reduction apparatus by external-heat reducing gases DRI device, interior gas-operated thermal bath facility adopt duplex combustion chamber and commutation accumulation of heat heating means to burn to purified gas, thermal source is provided to reduction chamber, lump ore or iron ore pellets reduce under hot environment in reduction chamber, and the waste gas after purified gas burning is washed one's hair clarifier by tail gas water and carried out after water is washed one's hair purification discharging;
(3), enter siphunculus by the reducing gases of external-heat reducing gases DRI device and pass into reducing gases to material cooling chamber, reducing gases blows to material cooling chamber, give the cooling of the high-temp solid product DRI after reduction reactions a large amount of in material cooling chamber, reducing gases is in giving the cooling of high-temp solid product DRI, and the temperature that improves reducing gases forms high temperature reduction gas;
(4) water-gas that, utilizes charcoal in low rank coal high temperature product smokeless char and superheated vapour to meet to carry out water gas reaction generation is as reducing gases, high temperature reduction gas enters reduction chamber, and contact with high temperature lump ore or the iron ore pellets material of reduction chamber, carry out tail gas after reduction reaction generation high temperature reduction;
(5), will reduce rear tail gas by reducing rear tail gas passing away importing pre-heating cabin to lump ore or iron ore pellets preheating, it is the preheating of above-mentioned the 1st step, steam after high temperature reduction in tail gas is cooled to water and washes one's hair clarifier through tail gas water and carry out after water is washed one's hair purification discharging through heat exchange, after high temperature reduction, other tail gas is washed one's hair clarifier through tail gas water and carried out after water is washed one's hair purification discharging;
(6), according to lump ore or iron ore pellets reducing degree, control in good time charging valve open or close, lump ore or iron ore pellets are entered by entering stove cloth passage in the reduction chamber of reduction apparatus; Control discharge with endless screw device and open or close, the solid product DRI after lump ore in material cooling chamber or iron ore pellets reduction cooling is entered in sealing finished bin.
2. continuous external heating type reducing gases DRI integrated approach as claimed in claim 1, it is characterized in that: described outer gas-operated thermal bath facility adopts duplex combustion chamber and commutation accumulation of heat heating means, the method relates to equipment and comprises outer gas-operated thermal bath facility, gas reversing arrangement, outer gas-operated thermal bath facility comprises the first combustion heater of at least one group of identical association of structure, the second combustion heater forms, the first described combustion heater mainly comprises the first combustion chamber, the first coal gas enters arm and the first regenerative heat exchanger, the second combustion heater structure also comprises the second combustion chamber, the second coal gas enters arm and the second regenerative heat exchanger, the step of the method is:
(1), air is blasted the first regenerative heat exchanger by gas reversing arrangement, after the first regenerative heat exchanger heating, enter in the first combustion chamber, gas reversing arrangement blasts purified gas in the first combustion chamber and burns, waste gas in the first combustion chamber after purified gas burning enters into the second combustion chamber, then is discharged by gas reversing arrangement after the second regenerative heat exchanger heat absorption;
(2), reach and set burning time, air is blasted the second regenerative heat exchanger by gas reversing arrangement, after the second regenerative heat exchanger heating, enter in the second combustion chamber, gas reversing arrangement blasts purified gas in the second combustion chamber and burns, waste gas in the second combustion chamber after purified gas burning enters into the first combustion chamber, then is discharged by gas reversing arrangement after the first regenerative heat exchanger heat absorption.
3. continuous external heating type reducing gases DRI integrated approach as claimed in claim 1, it is characterized in that: described interior gas-operated thermal bath facility adopts duplex combustion chamber and commutation accumulation of heat heating means, the method relates to equipment and comprises interior gas-operated thermal bath facility, gas reversing arrangement, interior gas-operated thermal bath facility comprises the 3rd combustion heater of at least one group of identical association of structure, the 4th combustion heater forms, the 3rd described combustion heater mainly comprises the 3rd combustion chamber, the 3rd coal gas enters arm and the 3rd regenerative heat exchanger, the 4th combustion heater structure also comprises the 4th combustion chamber, the 4th coal gas enters arm and the 4th regenerative heat exchanger, the step of the method is:
(1), air is blasted the 3rd regenerative heat exchanger by gas reversing arrangement, after the 3rd regenerative heat exchanger heating, enter in the 3rd combustion chamber, gas reversing arrangement blasts purified gas in the 3rd combustion chamber and burns, waste gas in the 3rd combustion chamber after purified gas burning enters into the 4th combustion chamber, then is discharged by gas reversing arrangement after the 4th regenerative heat exchanger heat absorption;
(2), reach and set burning time, air is blasted the 4th regenerative heat exchanger by gas reversing arrangement, after the 4th regenerative heat exchanger heating, enter in the 4th combustion chamber, gas reversing arrangement blasts purified gas in the 4th combustion chamber and burns, waste gas in the 4th combustion chamber after purified gas burning enters into the 3rd combustion chamber, then is discharged by gas reversing arrangement after the 3rd regenerative heat exchanger heat absorption.
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Publication number Priority date Publication date Assignee Title
CN1087951A (en) * 1992-12-05 1994-06-15 胡宝锁 Method and apparatus with the ore direct steelmaking
CN103194265A (en) * 2013-04-10 2013-07-10 山西鑫立能源科技有限公司 Thermal cycle continuous comprehensive method employing pyrolysis gasification of coal gangue

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CN103194272B (en) * 2013-04-10 2014-06-11 山西鑫立能源科技有限公司 Coal gangue pyrolysis gasification crude gas purified combustion recycling device

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Publication number Priority date Publication date Assignee Title
CN1087951A (en) * 1992-12-05 1994-06-15 胡宝锁 Method and apparatus with the ore direct steelmaking
CN103194265A (en) * 2013-04-10 2013-07-10 山西鑫立能源科技有限公司 Thermal cycle continuous comprehensive method employing pyrolysis gasification of coal gangue

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