CN203382782U - External heating type direct-reduced iron device by reducing gas - Google Patents

External heating type direct-reduced iron device by reducing gas Download PDF

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Publication number
CN203382782U
CN203382782U CN201320486069.0U CN201320486069U CN203382782U CN 203382782 U CN203382782 U CN 203382782U CN 201320486069 U CN201320486069 U CN 201320486069U CN 203382782 U CN203382782 U CN 203382782U
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gas
combustion
chamber
air
exhaust
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王新民
王福生
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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 utility model discloses an external heating type direct-reduced iron device by reducing gas. The external heating type direct-reduced iron device comprises a furnace body, a reducing device, a material cooling chamber and a reducing-gas introducing through pipe, wherein the reducing device comprises a reducing chamber, an external gas heating device, an internal gas heating device, a gas reversing device and a central supporting bow; the reducing chamber is positioned above the central supporting bow and forms a ring-shaped space by an internal ring wall and an external ring wall; the external gas heating device and the internal gas heating device are respectively arranged outside the external ring wall and inside the internal ring wall of the reducing chamber; the material cooling chamber is arranged at the lower part of the furnace body and is positioned below the central supporting bow, and the top of the material cooling chamber is communicated with the bottom of the reducing chamber; one end of the reducing-gas introducing through pipe leads to the material cooling chamber, and the other end of the reducing-gas introducing through pipe extends out of the furnace body and is used for externally connecting the reducing gas. The external heating type direct-reduced iron device disclosed by the utility model has the advantages that reduction and reduction heating are respectively and independently carried out, and the reducing gas is heated by solid products with high temperature after reduction, so that the reduction efficiency is high and the production cost is low.

Description

A kind of external-heat reducing gas direct-reduced iron device
Technical field
The utility model relates to gas base method reduced iron technology, particularly a kind of external-heat reducing gas direct-reduced iron device.
Background technology
At present, produce direct-reduced iron (DRI) by using the reductive agent difference, mainly contain the large class of the gentle base method two of coal-based method.Gas base method mainly with Sweet natural gas or with coal manufacture reducing gas or take coke-oven gas (COG), converter gas and (or) blast furnace (BF) stock gas replaces Sweet natural gas as reductive agent and thermal source, coal-based method be take coal as reductive agent and 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 be take Shaft Furnace Direct Reduction Process as technological trend, development along with gas-based shaft kiln directly reduced technology, many technical literature introductions are now also arranged, as patent documentation CN102304599A has introduced the method and apparatus that a kind of gas base reduction shaft furnace is produced direct-reduced iron, the literature is mainly that coke-oven gas is first isolated to H2 and Lin De gas, again H2 and gas maked coal Hybrid Heating are become to reducing gas, woods moral gas is as cooling gas, the shortcoming of this technology is that H2 and gas maked coal 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 gas of a kind of iron ore_coal pellet is produced direct-reduced iron as CN1896286B introduces, utilize the reducing gas 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 cyclic production of the Primordial Qi of surviving in formation and use, the shortcoming of this technology is to produce actual being easy to of new pyrolysis gas H2, CO to generate CO2, H2O in the body of heater burning, the H2 obtained, CO seldom, are difficult to realize continuous, efficient, a large amount of reduced iron production.
Given this, the utility model people has carried out deep analysis and research to gas-based shaft kiln directly reduced technique, utility model a whole set of new gas-based shaft kiln directly reduced iron composite technology technology.
The utility model content
The utility model provides a kind of external-heat reducing gas direct-reduced iron device, and this device is integrated the reduction of direct-reduced iron and cooling concentrating, and the reduction energy consumption is little, is applicable to the also original production of a large amount of direct-reduced irons.
The utility model is achieved through the following technical solutions: a kind of external-heat reducing gas direct-reduced iron device, comprise body of heater, reducing apparatus, material cooling chamber, reducing gas enters siphunculus, described reducing apparatus comprises the reduction chamber, outer combustion gas heating unit, interior gas-operated thermal bath facility, the gas reversing system, the center support bow, the reduction chamber is positioned at center support bow top, the reduction chamber is by fire-resistant thermally conductive material, outer ring wall forms an annulus, reduction top, chamber with enter stove cloth passage and communicate, outer combustion gas heating unit, interior gas-operated thermal bath facility is placed in respectively outside the outer ring wall of reduction chamber, in interior ringwall, described outer combustion gas heating unit comprises the first combustion heater of at least one group of identical association of structure, the second combustion heater, described the first combustion heater mainly comprises the first combustion chamber, the first coal gas enters arm and the first regenerative heat exchanger, the body of heater exterior wall that the first combustion chamber is built into by refractory materials, be built into fire-resistant thermally conductive material the gas-fired quirk that reduction outdoor ringwall and outer quirk partition wall surround a relative closure, the first coal gas enters arm and leads in the first combustion chamber through the body of heater exterior wall, described the first regenerative heat exchanger comprises the first accumulation of heat chamber, the first heat storage, the first air enters arm and the first combustion exhaust exhaust outlet, the first accumulation of heat chamber is arranged in the body of heater exterior wall, the first heat storage arranges in the first accumulation of heat chamber, the first accumulation of heat chamber one end leads to the first bottom, combustion chamber, the other end is connected to respectively the first air and enters arm and the first combustion exhaust exhaust outlet, described the second combustion heater structure is identical with the first combustion heater, also comprises that the second combustion chamber, the second coal gas enter arm and the second regenerative heat exchanger, the body of heater exterior wall that the second combustion chamber is built into by refractory materials, be built into fire-resistant thermally conductive material the gas-fired quirk that reduction outdoor ringwall and outer quirk partition wall surround a relative closure, the second coal gas enters arm and leads in the second combustion chamber through the body of heater exterior wall, described the second regenerative heat exchanger comprises the second accumulation of heat chamber, the second heat storage, the second air enters arm and the second combustion exhaust exhaust outlet, the second accumulation of heat chamber is arranged in the body of heater exterior wall, the second heat storage arranges in the second accumulation of heat chamber, the second accumulation of heat chamber one end leads to the second bottom, combustion chamber, the other end is connected to respectively the second air and enters arm and the second combustion exhaust exhaust outlet, between the second combustion chamber of the first combustion chamber and next-door neighbour, the top of outer quirk partition wall is provided with the combustion chamber through hole, and the combustion chamber through hole is connected the second combustion chamber of the first combustion chamber and next-door neighbour to form associated one group, association the 3rd combustion heater that at least one group of structure of interior gas-operated thermal bath facility is identical, the 4th combustion heater, it forms structure and combustion principle and associated the first burning heater, the second burning heater is identical, the 3rd combustion heater also comprises the 3rd combustion chamber, the 3rd coal gas enters arm, the 3rd accumulation of heat chamber, the 3rd heat storage, the 3rd air enters arm and the 3rd combustion exhaust exhaust outlet, described the 3rd combustion chamber is built into by fire-resistant thermally conductive material the gas-fired quirk that reduction indoor ringwall and internal-quirk partition wall surround a relative closure, the 3rd coal gas enter arm below the bar bow of center support bow through upwards leading to the 3rd combustion chamber, the 3rd accumulation of heat chamber is arranged on the body of heater of bar bow below, the 3rd heat storage is placed in the 3rd accumulation of heat chamber, lead to the 3rd bottom, combustion chamber through extending upward below the bar bow that the 3rd accumulation of heat chamber one end bends from center support by the extension passage, the 3rd accumulation of heat chamber the other end is connected to respectively the 3rd air and enters arm and the 3rd combustion exhaust exhaust outlet, the 4th combustion heater structure is complete identical with the 3rd combustion heater, also comprise the 4th combustion chamber, the 4th coal gas enters arm, the 4th accumulation of heat chamber, the 4th heat storage, the 4th air enters arm and the 4th combustion exhaust exhaust outlet, wherein the 4th combustion chamber is connected and is formed associated one group by chamber passage with the 3rd combustion chamber, described gas reversing system comprises dish, lower wall, the rotation reversing motor, air blower, gas fan, exhaust gas fan, lower wall is connected to respectively an air supervisor and the first air is in charge of, the second air is in charge of, a coal gas is responsible for and the first gas manifold, the second gas manifold, combustion exhaust supervisor and the second combustion exhaust are in charge of, the first combustion exhaust is in charge of, wherein, the second combustion exhaust is in charge of with the first combustion exhaust and is in charge of with the first air and is in charge of and is in charge of with the second air and the setting of the first gas manifold and the second gas manifold is just exchanged, upper dish is fitted in the lower wall top, upper dish correspondence respectively is provided with the air pipe connecting, the coal gas pipe connecting, the combustion exhaust pipe connecting, thereby the rotation reversing motor drives upper dish reciprocating rotation on lower wall and realizes that the air supervisor constantly is in charge of with the second air and is in charge of and is connected and cut off conversion with the first air, the coal gas supervisor is constantly connected and is cut off conversion with the first gas manifold and the second gas manifold, combustion exhaust supervisor constantly be in charge of with the first combustion exhaust and be in charge of and connected and cut off conversion with the second combustion exhaust, described the first air is in charge of with the first air and is entered arm, the 3rd air enters arm and couples together, described the first gas manifold and the first coal gas enter arm, the 3rd coal gas enters arm and couples together, described the first combustion exhaust is in charge of and the first combustion exhaust exhaust outlet, the 3rd combustion exhaust exhaust outlet couples together, in like manner, described the second air is in charge of with the second air and is entered arm, the 4th air enters arm and couples together, described the second gas manifold and the second coal gas enter arm, the 4th coal gas enters arm and couples together, described the second burning gas is in charge of and the second combustion exhaust exhaust outlet, the 4th combustion exhaust exhaust outlet couples together, described material cooling chamber is arranged on lower portion of furnace body and is positioned at center support bow below, and the top of material cooling chamber communicates bottom the reduction chamber, reducing gas enters siphunculus one end and leads to the top of material cooling chamber, and reducing gas enters siphunculus, and Open Side Down towards material cooling chamber, and the other end that reducing gas enters siphunculus stretches out outside body of heater for external reducing gas.
Described gas reversing system also comprises two groups of bustle pipes of the periphery that is arranged on body of heater, comprises the first air bustle pipe, the first coal gas bustle pipe, the first combustion exhaust bustle pipe; The second air bustle pipe, the second coal gas bustle pipe, the second combustion exhaust bustle pipe, described the first air bustle pipe the first air is in charge of with the first air enter arm, the 3rd air enters arm and couples together; Described the first coal gas bustle pipe by the first gas manifold and the first coal gas enter arm, the 3rd coal gas enters arm and couples together; Described the first combustion exhaust bustle pipe is that the first combustion exhaust is in charge of with the first combustion exhaust exhaust outlet, the 3rd combustion exhaust exhaust outlet and is coupled together; In like manner, described the second air bustle pipe the second air is in charge of with the second air enter arm, the 4th air enters arm and couples together; Described the second coal gas bustle pipe by the second gas manifold and the second coal gas enter arm, the 4th coal gas enters arm and couples together; Described the second combustion exhaust bustle pipe is in charge of the second burning gas with the second combustion exhaust exhaust outlet, the second combustion exhaust exhaust outlet and is coupled together.
Described the first air enters between arm and the first accumulation of heat chamber and is provided with the first one-way air valve, and the first one-way air valve allows air to enter pipe and the first accumulation of heat chamber flows into the first combustion chamber from the first air; Be provided with the first unidirectional waste gas valve between described the first combustion exhaust exhaust outlet and the first accumulation of heat chamber, the first unidirectional waste gas valve allows the gas-fired waste gas first accumulation of heat chamber of flowing through from the first combustion chamber, finally from the first combustion exhaust exhaust outlet, discharges; Described the second air enters between arm and the second accumulation of heat chamber and is provided with the second one-way air valve, and the second one-way air valve allows air to enter with the second accumulation of heat chamber and flow into the second combustion chamber from the second air; Be provided with the second unidirectional waste gas valve between the second combustion exhaust exhaust outlet and the second accumulation of heat chamber, the second unidirectional waste gas valve allows the gas-fired waste gas second accumulation of heat chamber of flowing through from the second combustion chamber, finally from the second combustion exhaust exhaust outlet, discharges.
Described outer combustion gas heating unit mainly is divided into upper, middle and lower segment formula heating, and every section by least one group of structure, identical and associated the first combustion heater, the second combustion heater form.
Described interior gas-operated thermal bath facility mainly is divided into upper and lower two-section type heating, and every section consists of at least one group of structure identical the 3rd combustion heater, the 4th combustion heater mutually.
Reduction of the present utility model is independently carried out respectively with the reduction heating, is independent of each other, and reducing gas is directly introduced by the external world, and the reducing gas introduction volume is regulated according to reduction high temperature lump ore or iron ore pellets situation, and reduction efficiency is high, distinguishes the existing self-produced reducing gas mode of production; By utilizing the higher solid product of temperature after lump ore or iron ore ball reduce directly to contact and heat reduction gas with reducing gas, reduce the solid product temperature simultaneously, not needing increases independent heating installation, meets energy-saving and cost-reducing that we advocate now, the theory of Sustainable development.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Fig. 1 is continuous external heating type reducing gas direct-reduction iron furnace schematic diagram of the present utility model.
Fig. 2 is gas reverser schematic diagram of the present utility model.
Fig. 3 coils schematic diagram on gas reverser of the present utility model.
Fig. 4 is gas reverser lower wall schematic diagram of the present utility model.
Fig. 5 is A-B place cross-sectional schematic in Fig. 3.
Fig. 6 is gas reverser of the present utility model and combustion heater pipe network connection diagram.
Fig. 7 is continuous external heating type reducing gas direct-reduction iron furnace schematic cross-section one of the present utility model, that is t-t place schematic cross-section in Fig. 1.
Fig. 8 is continuous external heating type reducing gas direct-reduction iron furnace schematic cross-section two of the present utility model, that is u-u place schematic cross-section in Fig. 1.
Fig. 9 is continuous external heating type reducing gas direct-reduction iron furnace schematic cross-section three of the present utility model, that is v-v place schematic cross-section in Fig. 1.
Figure 10 is continuous external heating type reducing gas direct-reduction iron furnace schematic cross-section four of the present utility model, that is x-x place schematic cross-section in Fig. 1.
Figure 11 is continuous external heating type reducing gas direct-reduction iron furnace schematic cross-section five of the present utility model, that is y-y place schematic cross-section in Fig. 1.
Figure 12 is continuous external heating type reducing gas direct-reduction iron furnace stove schematic cross-section six of the present utility model, that is z-z place schematic cross-section in Fig. 1.
Figure 13 is industry control central electrical connection diagram of the present utility model.
Figure 14 is that continuous external heating type reducing gas direct-reduced iron integration unit of the present utility model forms schematic diagram.
Figure 15 is pre-heating cabin cross sectional representation of the present utility model, 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 utility model, that is a-a place schematic cross-section in Figure 17.
Figure 17 is pre-heating cabin schematic diagram of the present utility model, that is a-a place schematic cross-section in Figure 17.
Figure 18 is that the atomized spray that tail gas water of the present utility model is washed one's hair cleaner is arranged in the form of a ring schematic diagram in purifying cylindrical shell, that is d-d place schematic cross-section in Figure 14.
Embodiment
The specific embodiment that external-heat reducing gas direct-reduction iron furnace of the present utility model comprehensively forms technique is mainly introduced in detail following.
First part's lump ore or the preparation of iron ore pellets raw material
Select 8-30mm lump ore (raw material) by crushing and screening, screen underflow is processed into the pelletizing (raw material) of the 15mm left and right granularity of not mixing tackiness agent through the high pressure nodulizer, in this size range, lump ore or iron ore pellets reduction reaction are more abundant, but this does not form the size restriction of the utility model to needed lump ore or iron ore pellets.
Second section 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 interchanger 13, blanking bin 14, drip pipe 125; Be formed for the feed bin 111 of lump ore or iron ore pellets preheating in housing 11, feed bin 111 relative closures, top only is provided with opening for feed 112, at opening for feed, 112 places are provided with rotary 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 has the airtight charging valve 15 that closes function.
As shown in Figure 14, Figure 15, Figure 16, Figure 17, hot gas interchanger 13 comprises that high temperature hot gas admission passage 131, high temperature hot gas enter chamber 132, radiating pipe 133, radiating pipe 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 exhaust channel 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 exhaust channel 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 pipe serial connection passages 134 are parallel feed bin 111 inside that are transverse in housing 11 in twos, being connected on high temperature hot gas enters between chamber 132 and cryogenic gas discharge chamber 136, one end 1341 of upper radiating pipe serial connection passage 134 and high temperature hot gas enter that chamber 132 communicates and the other end 1342 seals, one end 1341 sealings of next radiating pipe serial connection passage 134 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 pipes 133 also adopt metallic substance to make, several radiating pipes 133 are spaced on radiating pipe serial connection passage 134, radiating pipe 133 is " U " type, one terminates on parallel upper radiating pipe serial connection passage 134, the other end is connected on parallel next radiating pipe serial connection passage 134, parallel in twos radiating pipe serial connection passage 134 is connected mutually, be about to high temperature hot gas and enter chamber 132 and 136 connections of cryogenic gas discharge chamber, this example arranges many radiating pipes 133 and radiating pipe serial connection passage 134, contact area with increase and lump ore or iron ore pellets, raising is to lump ore or the pre-thermo-efficiency of iron ore pellets.
As shown in Figure 17, Figure 16, U-shaped radiating pipe 133 is the inverted U interval and is connected on radiating pipe serial connection passage 134, radiating pipe serial connection passage 134 is two rows and arranges, certainly can suitably increase or reduce the quantity of the quantity of U-shaped radiating pipe 133 on radiating pipe serial connection passage 134 and radiating pipe serial connection passage 134 itself, this as required the lump ore of preheating or iron ore pellets the situation such as amount, humidity and temperature and determine.
As shown in Figure 17, Figure 16, U-shaped radiating pipe 133 is inverted U, and the 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 an end of rotary conveyor 17 by bucket elevator 18, the other end of rotary conveyor 17 is placed in opening for feed 112 places, bucket elevator 18, rotary conveyor 17 link with industry control center 90, by industry control center 90, are automatically controlled by the work of bucket elevator 18, rotary conveyor 17.
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 rotary conveyor 17, rotary 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 to high temperature hot gas and enters in chamber 132 by reduction tail gas exhaust channel 85, high temperature hot gas admission passage 131 simultaneously, being connected in series passage 134 by radiating pipe again flows in radiating pipe 133, by another the adjacent radiating pipe serial connection passage 134 be connected with radiating pipe 133, flow in cryogenic gas discharge chamber 136, last cryogenic gas exhaust channel 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 gas direct-reduced iron operation, from and constantly to the feed bin 111 of housing 11, supplement new lump ore or iron ore pellets by bucket elevator 18, rotary conveyor 17, realize the continuously dehydrating drying to lump ore or iron ore pellets;
(4) after high temperature reduction, the steam in tail gas is cooled to water through 13 pairs of lump ores of hot gas interchanger or iron ore pellets heat exchange, and water of condensation is back to 125 discharges of below drip pipe by high temperature hot gas admission passage 131 and condensed water elimination arm 126.
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 outflow temperature after high temperature reduction is minimized again simultaneously, do not need to consume the extra energy, save production cost; In the rear tail gas of reduction, the steam water of condensation can discharge again smoothly, can not affect the reduction reaction of reducing gas direct-reduced iron.
In order to keep the neat and tidy of environment, the tail gas after reduction after tail gas, burning is washed one's hair cleaner 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 cleaner 16 and is comprised that purification cylindrical shell 161, atomized spray 162, stainless steel filter wire stratum reticulare 163, tank 165, water reservoir 166, sprinkling water pump 167, tail gas pod 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 pod 164, tank 165 all arrange and purify in cylindrical shell 161; Water reservoir 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 pod 164 is arranged on the top of tank 165, tail gas pod 164 connects tail gas and enters pipe 169, tail gas enters pipe 169 1 ends and is arranged on the top of tank 165, and tail gas enters pipe 169 the other ends and passes and purify cylindrical shell 161 and communicate with the external world; Be provided with stainless steel filter wire stratum reticulare 163 above tail gas pod 164, 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 water absorption tube 1603, water absorption tube 1603 stretches in water reservoir 166; Water reservoir 166 also communicates with tank 165 through purifying cylindrical shell 161 by communicating pipe 1604.
As shown in figure 14, offer access opening 1611 at purification cylindrical shell 161 walls near above stainless steel filter wire stratum reticulare 163, the one, facilitate the workman to enter and purify the interior atomized spray 162 to damaging of cylindrical shell 161, stainless steel filter wire stratum reticulare 163 is keeped 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-in 1612, by in 162 pairs of tanks 165 of water-in, injecting clean water, so that the sewage to dust suction in tank 165 is changed, at purification cylindrical shell 161 walls near tank 165 edges, offer into water overflow port 1613, the unnecessary water of tank 165 can be discharged from here, avoid the water in tank 165 to flood too much the opening of tail gas pod 164, causing tail gas to enter is obstructed.
As Figure 18, shown in Figure 14, for to filtering better dust in tail gas, a plurality of atomized spray 162 161 are arranged in the form of a ring in purifying cylindrical shell, stretch out to purify outside cylindrical shell 161 by many water inlet pipes 1601 and connect with water inlet bustle pipe 1602, in addition can also be in purifying cylindrical shell 161 spaced many group atomized spray 162 from bottom to top, 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 cleaner 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 be lowered the temperature to hot tail gas.
As shown in figure 13, spray water pump 167 and link with industry control center 90, by industry control center 90, automatically control the work of spraying water pump 167.
The Principle Method that this routine tail gas water is washed one's hair purification is:
(1), the tail gas after the burning enters pipe 169 by tail gas and enters the tail gas pod 164 purified 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 and discharges by spoil disposal pipeline 1650 in the water of immersion tank;
(2), the tail gas after flow surface absorption upwards filtered through stainless steel filter wire stratum reticulare 163, elimination tail gas major part dust;
(3), through stainless steel filter wire stratum reticulare 163, filter after tail gas enter again the water smoke layer that atomized spray 162 water sprays form, in tail gas, through the water smoke layer, clean by purifying exhaust port 168 qualified discharges at cylindrical shell 161 tops.
For allow the discharge tail gas in dustiness be reduced to minimum, on it, (3) further supplements and be: after filtering through stainless steel filter wire stratum reticulare 163, tail gas enters the water smoke layer that atomized spray 162 forms again, upwards entering the stainless steel filter wire stratum reticulare 163 that the order number is larger in tail gas after the water smoke layer cleans filters again again, the water smoke layer that larger stainless steel filter wire stratum reticulare 163 top atomized spray 162 form through this order number again cleans, finally by purifying exhaust port 168 qualified discharges at cylindrical shell 161 tops.
Third part 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, reducing apparatus 6 is arranged on body of heater 91 middle parts, mainly comprises reduction chamber 61, outer combustion gas heating unit 64, interior gas-operated thermal bath facility 67, gas reversing system 66, center support bow 65, as Fig. 7, Fig. 8, shown in Fig. 9: reduction chamber 61 is by fire-resistant thermally conductive 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 ring peripheries of reduction is outer combustion gas heating unit 64, indoor ringwall 612 rings that reduce are interior is interior gas-operated thermal bath facility 67, and wherein outer combustion gas heating unit 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 the epimere preheating from top to bottom, heating is continued in stage casing, hypomere is mainly the reduction reaction three phases, so reduction chamber 61 height designs are higher, corresponding outer combustion gas heating unit 64 also mainly is divided into, in, lower Three-section type heating, every section 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 mainly is divided into, lower two-section type 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, described the first 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 materials and fire-resistant thermally conductive material are built into the gas-fired quirk that reduction outdoor ringwall 611 and outer quirk partition wall 625 surround 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 combustion exhaust 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, the first accumulation of heat chamber 626 1 ends lead to 621 bottoms, the first combustion chamber, and the other end is connected to respectively the first air and enters arm 627 and the first combustion exhaust exhaust outlet 628.
As shown in Figure 9, enter between arm 627 and the first accumulation of heat chamber 626 and be provided with the first one-way air valve 629, the first one-way air valves 629 and allow air to enter pipe the 627 and first accumulation of heat chamber 626 from the first air to flow into the first combustion chambers 621 at the first air; Be provided with the first unidirectional waste gas valve 620 between the first combustion exhaust exhaust outlet 628 and the first accumulation of heat chamber 626, 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 from the first combustion exhaust exhaust outlet 628, discharge (certainly, adopt gas reversing system 66 as described below, be in charge of 6671 connections when air supervisor the 667 and first air, air supervisor the 667 and second air is in charge of 6673 in cutting off; Meanwhile, combustion exhaust supervisor 669 is in charge of 6691 with the first combustion exhaust and also cuts off mutually, and corresponding combustion exhaust supervisor the 669 and second combustion exhaust is 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 materials and fire-resistant thermally conductive material are built into the gas-fired quirk that reduction outdoor ringwall 611 and outer quirk partition wall 625 surround 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 combustion exhaust 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, the second accumulation of heat chamber 606 1 ends lead to 601 bottoms, the second combustion chamber, the other end is connected to respectively the second air and enters arm 607 and the second combustion exhaust 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 allows air to enter pipe the 607 and second accumulation of heat chamber 606 from the second air and flows into the second combustion chamber 601, be provided with the second unidirectional waste gas valve 600 between the second combustion exhaust exhaust outlet 608 and the second accumulation of heat chamber 606, 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 from the second combustion exhaust exhaust outlet 608, discharge (certainly, adopt gas reversing system 66 as described below, when air supervisor the 667 and first air is in charge of 6671 cut-outs, air supervisor the 667 and second air is in charge of 6673 in connecting, meanwhile, combustion exhaust supervisor the 669 and first combustion exhaust is in charge of 6691 and also is connected, and corresponding combustion exhaust supervisor 669 is in charge of 6693 also cut-outs mutually with the second combustion exhaust, 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 second combustion chamber 601 of the first combustion chamber 621 and next-door neighbour to form associated one group, 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 combustion gas heating unit 64 mainly is divided into the 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 also is provided with chamber temperature monitoring holes 6201 and combustion chamber spy hole 6202, combustion chamber spy hole 6202 is convenient to the gas-fired situation that the technician directly observes each combustion chamber, be provided with chamber temperature table 6203 in chamber temperature monitoring holes 6201 for the temperature monitoring to combustion chamber, to the assessment of lump ore or iron ore pellets process.
As Figure 13 shows: chamber temperature table 6203 links with industry control center 90, by industry control center 90, automatically gathers the temperature data of chamber temperature table 6203.
As Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, gas reversing system 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 air supervisor 667 and first air and is in charge of 6671, the second air is in charge of 6673, coal gas supervisor 668 and first gas manifold 6681, the second gas manifold 6683, combustion exhaust supervisor 669 and second combustion exhaust is in charge of 6693, the first combustion exhaust is in charge of 6691, wherein, the second combustion exhaust is in charge of the 6693 and first combustion exhaust and is in charge of the 6691 and first air and is in charge of the 6671 and second air and is in charge of the setting of the 6673 and first gas manifold 6681 and the second gas manifold 6683 and just exchanges (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 correspondence respectively is provided with air pipe connecting 6672, coal gas pipe connecting 6682, combustion exhaust pipe connecting 6692, thereby rotation reversing motor 663 drives upper dish 661 reciprocating rotation on lower wall 662 and realizes that air supervisor 667 constantly is in charge of the 6671 and second air with the first air and is in charge of 6673 and is connected and cut off conversion, coal gas supervisor 668 is constantly connected and is cut off conversion with the first gas manifold 6681 and the second gas manifold 6683, combustion exhaust supervisor 669 constantly is in charge of the 6693 and first combustion exhaust with the second combustion exhaust and is in charge of 6691 and is connected and cut off conversion (with the first air, be in charge of the 6671 and second air to be in charge of the switching of the 6673 and first gas manifold 6681 and the second gas manifold 6683 just contrary).
As shown in Fig. 1, Fig. 6, also be 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 combustion exhaust bustle pipes 6694; The second air bustle pipe 6675, the second coal gas bustle pipe 6685, the second combustion exhaust bustle pipes 6695.
As shown in Fig. 1, Fig. 6, the first air bustle pipe 6674 is in charge of the 6671 and first air by the first air and is entered arm 627 and couple together, by the first air be in charge of the 6671, first air bustle pipe 6674, the first air enters arm 627, the first accumulation of heat chamber 626 and the first combustion chamber 621 and forms 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, and the first gas manifold 6681, the first coal gas bustle pipe 6684, the first coal gas is entered to arm 622 and the first combustion chamber 621 forms same path;
Simultaneously now, the first combustion exhaust bustle pipe 6694 is the first combustion exhaust to be in charge of to the 6691 and first combustion exhaust exhaust outlet 628 couple together, and the first combustion exhaust is in charge of to the 6691, first combustion exhaust bustle pipe 6694, the first combustion exhaust exhaust outlet 628, the same path of the first 626Yu combustion chamber, accumulation of heat chamber 621 formation.
In like manner, the second air bustle pipe 6675 is in charge of the 6673 and second air by the second air and is entered arm 607 and couple together, by the second air be in charge of the 6673, second air bustle pipe 6675, the second air enters arm 607, the second accumulation of heat chamber 606 and the second combustion chamber 601 and forms 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, and the second gas manifold 6683, the second coal gas bustle pipe 6685, the second coal gas is entered to arm 602 and the second combustion chamber 601 forms same path;
Meanwhile, the second combustion exhaust bustle pipe 6695 is in charge of the 6693 and second combustion exhaust exhaust outlet 608 by the second burning gas and is coupled together, and the second combustion exhaust is in charge of to the 6693, second combustion exhaust bustle pipe 6695, the second combustion exhaust exhaust outlet 608, the second accumulation of heat chamber 606 and the second combustion chamber 601 and forms same path.
In addition, exhaust gas fan 666 enters pipe by pipeline 6661 and tail gas and 169 is connected, thereby the tail gas pod 164 of with tail gas water, washing one's hair cleaner 16 communicates; Shown in Figure 13; this example also comprises that gas reversing system controller 906 is for controlling rotation reversing motor 663, air blower 664, gas fan 665, exhaust gas fan 666; gas reversing system electric controller 906 links with upper industry control center 90 again; certainly from electric control theory; in this example, rotation reversing motor 663, air blower 664, gas fan 665, exhaust gas fan 666 are controlled by also can directly at industry control center 90, so the restriction that gas reversing system 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 combustion gas heating unit 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 the 667 and first air is in charge of 6671 connections, and air supervisor the 667 and second air is in charge of 6673 in dissengaged positions; Simultaneously, coal gas supervisor the 668 and first gas manifold 6681 also is connected, and coal gas supervisor the 668 and second gas manifold 6683 is in dissengaged positions; Meanwhile, combustion exhaust supervisor 669 is in charge of 6691 with the first combustion exhaust and also cuts off mutually, and corresponding combustion exhaust supervisor the 669 and second combustion exhaust is 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 pipe connecting 6672, the first air be in charge of the 6671, first air bustle pipe 6674, the first air enters arm 627 and enters into the first accumulation of heat chamber 626, after the heat that utilizes the first heat storage 623 to discharge is heated air, enter in the first combustion chamber 621, simultaneously, gas fan 665 blasts coal gas supervisor 668 by purified gas, coal gas enters coal gas pipe connecting 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 burnt, meanwhile, because combustion exhaust supervisor 669 is in charge of 6691 in the phase dissengaged positions with the first combustion exhaust, and corresponding combustion exhaust supervisor the 669 and second combustion exhaust is 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 combustion exhaust exhaust outlet 608, the second combustion exhaust bustle pipe 6695, the second combustion exhaust is in charge of 6693, combustion exhaust pipe connecting 6692, combustion exhaust supervisor 669 discharges by exhaust gas fan 666,
(3) reach and set combustion time, industry control center 90 starts the upper dish 661 of rotation reversing motor 663 drive and rotates backward on lower wall 662, air supervisor the 667 and first air is in charge of 6671 cut-outs, air supervisor the 667 and second air is 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 the 668 and second gas manifold 6683 on-states, meanwhile, combustion exhaust supervisor the 669 and first combustion exhaust is in charge of 6691 and also is connected, and corresponding combustion exhaust supervisor the 669 and second combustion exhaust is in charge of 6693 also phase dissengaged positions,
(4) air blower 664 by air blast air supervisor 667, air enter successively through air pipe connecting 6672, the second air be in charge of the 6673, second air bustle pipe 6675, the second air enters arm 607 and enters 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 is heated air, enter in the second combustion chamber 601, simultaneously, gas fan 665 blasts coal gas supervisor 668 by purified gas, coal gas enters coal gas pipe connecting 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 burnt, meanwhile, because combustion exhaust supervisor the 669 and first combustion exhaust is in charge of 6691 and is connected, and corresponding combustion exhaust supervisor the 669 and second combustion exhaust is in charge of 6693 in the phase dissengaged positions, so the waste gas in the second combustion chamber 601 after gas-fired can only enter by the combustion chamber through hole 6251 on outer quirk partition wall 625 tops in the first combustion chamber 621, again through the first accumulation of heat chamber 626, after the first heat storage 603 in the first accumulation of heat chamber 626 carries out absorbing and cooling temperature, finally from the first combustion exhaust exhaust outlet 628, the first combustion exhaust bustle pipe 6694, the first combustion exhaust is in charge of 6691, combustion exhaust supervisor 669 discharges by exhaust gas fan 666, so outer combustion gas heating unit 64 combustion principle are the waste gas generated after gas-fired in the first combustion chamber 621 and enter the second combustion chamber 601 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, the waste gas generated 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 cleaner 16 carry out water wash one's hair purify after clean the discharge.
In sum, this gas by the gas reversing system two advances the mode of operation of the regenerative heat exchange of a mode of operation out and regenerative heat exchanger, realize the combustion heater alternate combustion of two groups of associations, be that the gas reversing system is sent into air, purified gas burning to the combustion chamber of the first combustion heater, while is the hot waste gas after the sucking-off burning from the combustion chamber of the second combustion heater, and 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 discharge; In like manner, the gas reversing system is sent into air, purified gas burning to the combustion chamber of the second combustion heater, while is the hot waste gas after the sucking-off burning from the combustion chamber of the first combustion heater, and 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 discharge; This method of mutually utilizing waste gas residual heat after gas-fired to be added warm air, both played the waste gas residual heat after gas-fired had been taken full advantage 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 purpose, 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 automatization.
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 mainly is divided into, lower two-section type 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 combustion principle with above introduction, the second burning heater 60 is almost completely 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 combustion exhaust exhaust outlet 688.
As shown in Fig. 1, Fig. 9, Figure 11, the 3rd combustion chamber 681 is built into by fire-resistant thermally conductive material the gas-fired quirk that reduction indoor ringwall 612 and internal-quirk partition wall 635 surround a relative closure.
As shown in Figure 1, Figure 10 shows, the 3rd coal gas of hypomere enter arm 682 below the bar bow 651 of center support bow 65 through upwards leading to the 3rd combustion chamber 681, the 3rd accumulation of heat chamber 686 is arranged on the body of heater 91 that bar bends 651 belows, the 3rd heat storage 683 is placed in the 3rd accumulation of heat chamber 686, the 3rd accumulation of heat chamber 686 1 ends lead to three combustion chamber 681 bottoms through extending upward by extending passage 6861 below the bar bow 651 of center support bow 65, and the 3rd accumulation of heat chamber 686 the other ends are connected to respectively the 3rd air and enter arm 687 and the 3rd combustion exhaust exhaust outlet 688.
As Fig. 1, Fig. 9, shown in Figure 10, the 3rd coal gas of epimere enter arm 682 below the bar bow 651 of center support bow 65 through upwards through quirk partition wall 635, leading to the 3rd combustion chamber 681, the 3rd accumulation of heat chamber 686 is arranged on the body of heater 91 that bar bends 651 belows, the 3rd heat storage 683 is placed in the 3rd accumulation of heat chamber 686, the 3rd accumulation of heat chamber 686 1 ends by extend passage 6861 below the bar bow 651 of center support bow 65 through upwards through quirk partition wall 635, extending and lead to 681 bottoms, the 3rd combustion chamber, the 3rd accumulation of heat chamber 686 the other ends are connected to respectively the 3rd air and enter arm 687 and the 3rd combustion exhaust 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 enters arm 682, the 3rd air and enters arm 687 and the 3rd combustion exhaust exhaust outlet 688 and be in charge of the 6671, first combustion exhaust by the first coal gas bustle pipe 6684, the first air bustle pipe 6674, the first combustion exhaust bustle pipes 6694 and the first gas manifold 6681, the first air respectively and be in charge of 6691 and communicate.
As shown in Fig. 6, Figure 10, the 4th coal gas of the 4th combustion chamber 691 of the 4th burning heater 69 enters arm 692, the 4th air and enters arm 697 and the 4th combustion exhaust exhaust outlet 698 and be in charge of the 6673, second combustion exhaust by the second coal gas bustle pipe 6685, the second air bustle pipe 6675, the second combustion exhaust bustle pipe 6695 and the second gas manifold 6683, the second air respectively and be in charge of 6693 and communicate.
Here, the 3rd burning heater 68, the 4th combustion heater 69 combustion principle and above the first burning heater 62, the second burning heater 60 are almost completely 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 internal combustion heating unit 67 of reducing all is arranged in furnace chamber, need center support bow 65 for it provides support, the laying of various pipelines is provided to internal combustion heating unit 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, internal combustion heating unit 67 belows, the bar that mainly comprises some bends 651 ,Huo Gong center ringwalls 652, bar bow 651 1 ends are 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 internal combustion heating unit 67.
As shown in Fig. 1, Figure 10, Fig. 9, Figure 11, article one, in the body of wall of fire bow 651, the extension passage 6861 that the 3rd coal gas enters arm 682 and the 3rd accumulation of heat chamber 686 is set, the 4th coal gas tightly arranged in the body of wall of another adjacent fire bow 651 enters the extension passage 6961 in arm 692 and the 4th accumulation of heat chamber 696, provide convenience to the pipeline laying of internal combustion heating unit 67, make the various conduit arrangements of internal combustion heating unit 67 orderly, be unlikely to interfere.
In sum, the type of heating of reducing apparatus 6 is by outer combustion gas heating unit 64, interior gas-operated thermal bath facility 67 adopts duplex combustion chamber and commutation heating, on outer combustion gas heating unit 64 minutes, in, lower three sections heating, on interior gas-operated thermal bath facility 67 minutes, lower two sections heating, provide thermal source in reduction chamber 61, in addition, in reduction, chamber 61 is indoor carries out separately for the reduction reaction of this reducing 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 gas is produced direct-reduced iron, making reduction reaction and reduction reaction heat respectively can be continuous, controlled carrying out, mutually coordinate and don't restriction mutually, impact.
The second section reduction reaction
Because lump ore or iron ore pellets temperature in the reduction chamber is higher, pass into reducing gas to again lump ore or iron ore pellets, reducing gas can be natural gas or manufacture reducing gas or with coke-oven gas (COG) with coal, converter gas and (or) blast furnace (BF) stock gas, the utility model 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 ratio, other component content is low, it is desirable reducing gas product, also can obtain pure hydrogen as reducing gas by pressure-variable adsorption or membrane separation process.
As shown in Fig. 1, Figure 12, external-heat reducing gas direct-reduced iron device 7 comprises that reducing apparatus 6, material cooling chamber 70, reducing gas enter siphunculus 707.
As shown in Figure 1, the reduction chamber 61 of reducing apparatus 6 is positioned at center support and bends 65 tops, outer combustion gas heating unit 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 combustion gas heating unit 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 guarantee required heat and the temperature of reduction to reduction chamber 61, be not limited to above-mentioned outer combustion gas heating unit 64, the type 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 gas enters siphunculus 707 1 ends and leads to the top of material cooling chamber 70, and reducing gas enters the opening 708 of siphunculus 707 downwards towards material cooling chamber 70, and the other end that reducing gas enters siphunculus 707 stretches out outside body of heater 91 for external reducing gas.
Reduction reaction Principle Method of the present utility model is:
(1), by reducing gas, enter siphunculus 707 and pass into reducing gas to material cooling chamber 70, reducing gas blows to material cooling chamber 70, to the cooling of the high-temp solid product direct-reduced iron after reduction reactions a large amount of in material cooling chamber 70, reducing gas, when giving the cooling of high-temp solid product direct-reduced iron, improves the reducing gas 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 combustion gas heating unit 64, interior gas-operated thermal bath facility 67, the upper, middle and lower segment heating in 64 minutes of outer combustion gas heating unit, the upper and lower two sections heating in 67 minutes of interior gas-operated thermal bath facility, provide institute's heat 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 utility model utilizes the reducing gas master, the high-temp solid product direct-reduced iron of water-gas after to reduction reaction is heated when carrying out the air cooling cooling, do not need additionally to increase the heating installation of reducing gas, do not need independent cooling system yet, save energy consumption, production cost is minimized.
After the 3rd joint reduction, tail gas is derived
After the reduction of the generation after the reducing gas direct-reduced iron, tail gas is mainly steam and carbon dioxide, and after reduction, the temperature of tail gas is higher, needs to derive in order to utilize.
As shown in Fig. 1, Fig. 7, Figure 14, after reduction, tail gas exhaust channel 85 arranges in the exterior wall of body of heater 91, with reduction 61 top, chamber, communicates; As shown in Figure 7, after 4 reduction, tail gas exhaust channel 85 arranges in the exterior wall of body of heater 91, and after reduction, the entrance 851 of tail gas exhaust channel 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 exhaust channel 85.
These routine characteristics will be in reduction chamber 61 after the reduction after reduction reaction tail gas from reduction 61 top, chamber, derive smoothly.
The 4th joint continuous external heating type reducing gas direct-reduced iron
Comprehensively above-mentioned, these routine characteristics are 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, make lump ore or iron ore pellets reduction reaction be able to continuous realization.
As shown in figure 14, continuous external heating type reducing gas direct-reduction iron furnace 9 comprise body of heater 91, pre-heating cabin 1, enter stove cloth passage 921, tail gas exhaust channel 85, discharge with endless screw device 96, sealing finished bin 94 after external-heat reducing gas direct-reduced iron device 7, reduction; After pre-heating cabin 1, external-heat reducing gas direct-reduced iron device 7, reduction, the concrete structure of tail gas exhaust channel 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 exhaust channel 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 reducing 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 gas direct-reduced iron device 7, sealing finished bin 94 is placed in body of heater 91 bottoms, connect discharge with endless screw device 96 on sealing finished bin 94, 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 gas direct-reduced iron is:
(1), by bucket elevator 18, lump ore or iron ore pellets are delivered to rotary conveyor 17, rotary conveyor 17 preheating from pre-heating cabin 1 by lump ore or iron ore pellets, then by entering stove cloth passage 921, enter in the reduction chamber 61 of reducing apparatus 6;
(2), gas-fired provides thermal source to reduction chamber 61 after the 67 pairs of purifications of outer combustion gas heating unit 64, interior gas-operated thermal bath facility of the reducing apparatus 6 by external-heat reducing gas direct-reduced iron device 7, lump ore or iron ore pellets are reduced under hot environment in reduction chamber 61;
(3), by reducing gas, enter siphunculus 707 and pass into reducing gas to material cooling chamber 70, reducing gas blows to material cooling chamber 70, to the cooling of the high-temp solid product direct-reduced iron after reduction reactions a large amount of in material cooling chamber 70, reducing gas is when giving the cooling of high-temp solid product direct-reduced iron, and the temperature that improves reducing gas 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), will reduce after tail gas import high temperature hot gas admission passages 131 and enter 1 pair of lump ore of pre-heating cabin or iron ore pellets preheating by reducing rear tail gas exhaust channel 85, it is the preheating of above-mentioned the 1st step, steam after high temperature reduction in tail gas is cooled to water through 13 pairs of lump ores of hot gas interchanger or iron ore pellets heat exchange, and water of condensation is back to 125 discharges of below drip pipe by high temperature hot gas admission passage 131 and condensed water elimination arm 126;
(6), according to lump ore or iron ore pellets reducing degree, control charging valve 15 in good time and open or close, by lump ore or iron ore pellets, by entering stove cloth passage 921, enter in the reduction chamber 61 of reducing apparatus 6; Control discharge with endless screw device 96 and open or close, the solid product direct-reduced iron after lump ore in material cooling chamber 70 or iron ore pellets reduction cooling is entered in sealing finished bin 94.
This example is incorporated into same body of heater by lump ore or iron ore pellets preheating, heating, reducing process, 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 characteristics of low consumption, environmental protection.
The 4th partial continuous external-heat reducing gas direct-reduced iron is comprehensive
First segment continuous external heating type reducing gas direct-reduced iron integration unit
As shown in figure 14, comprehensively above-mentioned, draw continuous external heating type reducing gas direct-reduced iron integration unit, comprise that continuous external heating type reducing gas direct-reduction iron furnace 9, tail gas water washes one's hair cleaner 16, the exhaust gas fan 666 of the gas reversing system 66 of the reducing apparatus 6 of continuous external heating type reducing gas direct-reduction iron furnace 9 enters pipe by pipeline 6661 and tail gas and 169 is connected, thereby the tail gas pod 164 of with tail gas water, washing one's hair cleaner 16 communicates; The drip pipe 125 of the pre-heating cabin 1 of continuous external heating type reducing gas direct-reduction iron furnace 9 is discharged pipe connecting 1381 by condensed water elimination pipe connecting 1251 and cryogenic gas exhaust channel 138 by cryogenic gas, jointly stretching into tail gas water washes one's hair in the purification cylindrical shell 161 of cleaner 16, the outlet that cryogenic gas is discharged pipe connecting 1381 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 gas direct-reduced iron integrated approach is: further supplement in the 2nd step of the method for above-mentioned continuous external heating type reducing gas direct-reduced iron and be, above-mentioned outer combustion gas heating unit 64, interior gas-operated thermal bath facility 67 adopt duplex combustion chamber and commutation heating, provide thermal source to reduction in chamber 61, the waste gas in outer combustion gas heating unit 64, interior gas-operated thermal bath facility 67 after the purified gas burning by exhaust gas fan 666 enter tail gas water wash one's hair in cleaner 16 carry out water wash one's hair purify after clean the discharge, further supplement in the 5th step of the method for above-mentioned continuous external heating type reducing gas direct-reduced iron and be, after reducing, tail gas is derived high temperature hot gas admission passages 131 and is entered 1 pair of lump ore of pre-heating cabin or iron ore pellets preheating by reducing rear tail gas exhaust channel 85, it is the preheating of above-mentioned the 1st step, steam after high temperature reduction in tail gas is through 13 pairs of lump ores of hot gas interchanger or iron ore pellets heat exchange and be cooled to water, water of condensation 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 pipe connecting 1251 washes one's hair in the tank 165 of cleaner 16, reduction tail gas is discharged pipe connecting 1381 inflow tail gas water by cryogenic gas and is washed one's hair in the purification cylindrical shell 161 of cleaner 16, through after the cleaning of the water smoke layer through atomized spray 162 and 163 filtrations of stainless steel filter wire stratum reticulare, reaching clean discharge, protection of the environment.
Be further refined as: the upper, middle and lower segment heating in 64 minutes of outer combustion gas heating unit, the upper and lower two sections heating in 67 minutes 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 gas direct-reduced iron
As shown in figure 13: the control device of continuous external heating type reducing gas direct-reduced iron integration unit, comprise that bucket elevator 18, rotary 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 link, and are controlled their work automatically by industry control center 90.
The control method of continuous external heating type reducing gas direct-reduced iron 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 lump ore or the iron ore pellets after preheating in blanking bin 14, enter the furnace entering volume of the reduction chamber 61 of reducing apparatus 6 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 combustion gas heating unit 64, interior gas-operated thermal bath facility 67 is washed one's hair in cleaner 16 and is purified;
(4), the pump water yield of industry control center 90 adjustment sprinkling water pumps 167 realizes the waste gas after burning is pumped into the purification of tail gas, the rear tail gas of reduction.
Above content introduction just exemplifies a tool embodiment of continuous external heating type reducing gas direct-reduced iron integration unit and technique, does not form the restriction to this case continuous external heating type reducing gas direct-reduced iron integration unit and technique protection domain.

Claims (5)

1. an external-heat reducing gas direct-reduced iron device, it is characterized in that: comprise that body of heater, reducing apparatus, material cooling chamber, reducing gas enter siphunculus, described reducing apparatus comprises reduction chamber, outer combustion gas heating unit, interior gas-operated thermal bath facility, gas reversing system, center support bow, the reduction chamber is positioned at center support bow top, the reduction chamber forms an annulus by the inside and outside ringwall of fire-resistant thermally conductive material, reduction top, chamber communicates with entering stove cloth passage, the outer ring wall that outer combustion gas heating unit, interior gas-operated thermal bath facility are placed in respectively the reduction chamber outward, in interior ringwall, described outer combustion gas heating unit comprises the first combustion heater of at least one group of identical association of structure, the second combustion heater, described the first combustion heater mainly comprises the first combustion chamber, the first coal gas enters arm and the first regenerative heat exchanger, the body of heater exterior wall that the first combustion chamber is built into by refractory materials, be built into fire-resistant thermally conductive material the gas-fired quirk that reduction outdoor ringwall and outer quirk partition wall surround a relative closure, the first coal gas enters arm and leads in the first combustion chamber through the body of heater exterior wall, described the first regenerative heat exchanger comprises the first accumulation of heat chamber, the first heat storage, the first air enters arm and the first combustion exhaust exhaust outlet, the first accumulation of heat chamber is arranged in the body of heater exterior wall, the first heat storage arranges in the first accumulation of heat chamber, the first accumulation of heat chamber one end leads to the first bottom, combustion chamber, the other end is connected to respectively the first air and enters arm and the first combustion exhaust exhaust outlet, described the second combustion heater structure is identical with the first combustion heater, also comprises that the second combustion chamber, the second coal gas enter arm and the second regenerative heat exchanger, the body of heater exterior wall that the second combustion chamber is built into by refractory materials, be built into fire-resistant thermally conductive material the gas-fired quirk that reduction outdoor ringwall and outer quirk partition wall surround a relative closure, the second coal gas enters arm and leads in the second combustion chamber through the body of heater exterior wall, described the second regenerative heat exchanger comprises the second accumulation of heat chamber, the second heat storage, the second air enters arm and the second combustion exhaust exhaust outlet, the second accumulation of heat chamber is arranged in the body of heater exterior wall, the second heat storage arranges in the second accumulation of heat chamber, the second accumulation of heat chamber one end leads to the second bottom, combustion chamber, the other end is connected to respectively the second air and enters arm and the second combustion exhaust exhaust outlet, between the second combustion chamber of the first combustion chamber and next-door neighbour, the top of outer quirk partition wall is provided with the combustion chamber through hole, and the combustion chamber through hole is connected the second combustion chamber of the first combustion chamber and next-door neighbour to form associated one group, association the 3rd combustion heater that at least one group of structure of interior gas-operated thermal bath facility is identical, the 4th combustion heater, it forms structure and combustion principle and associated the first burning heater, the second burning heater is identical, the 3rd combustion heater also comprises the 3rd combustion chamber, the 3rd coal gas enters arm, the 3rd accumulation of heat chamber, the 3rd heat storage, the 3rd air enters arm and the 3rd combustion exhaust exhaust outlet, described the 3rd combustion chamber is built into by fire-resistant thermally conductive material the gas-fired quirk that reduction indoor ringwall and internal-quirk partition wall surround a relative closure, the 3rd coal gas enter arm below the bar bow of center support bow through upwards leading to the 3rd combustion chamber, the 3rd accumulation of heat chamber is arranged on the body of heater of bar bow below, the 3rd heat storage is placed in the 3rd accumulation of heat chamber, lead to the 3rd bottom, combustion chamber through extending upward below the bar bow that the 3rd accumulation of heat chamber one end bends from center support by the extension passage, the 3rd accumulation of heat chamber the other end is connected to respectively the 3rd air and enters arm and the 3rd combustion exhaust exhaust outlet, the 4th combustion heater structure is complete identical with the 3rd combustion heater, also comprise the 4th combustion chamber, the 4th coal gas enters arm, the 4th accumulation of heat chamber, the 4th heat storage, the 4th air enters arm and the 4th combustion exhaust exhaust outlet, wherein the 4th combustion chamber is connected and is formed associated one group by chamber passage with the 3rd combustion chamber, described gas reversing system comprises dish, lower wall, the rotation reversing motor, air blower, gas fan, exhaust gas fan, lower wall is connected to respectively an air supervisor and the first air is in charge of, the second air is in charge of, a coal gas is responsible for and the first gas manifold, the second gas manifold, combustion exhaust supervisor and the second combustion exhaust are in charge of, the first combustion exhaust is in charge of, wherein, the second combustion exhaust is in charge of with the first combustion exhaust and is in charge of with the first air and is in charge of and is in charge of with the second air and the setting of the first gas manifold and the second gas manifold is just exchanged, upper dish is fitted in the lower wall top, upper dish correspondence respectively is provided with the air pipe connecting, the coal gas pipe connecting, the combustion exhaust pipe connecting, thereby the rotation reversing motor drives upper dish reciprocating rotation on lower wall and realizes that the air supervisor constantly is in charge of with the second air and is in charge of and is connected and cut off conversion with the first air, the coal gas supervisor is constantly connected and is cut off conversion with the first gas manifold and the second gas manifold, combustion exhaust supervisor constantly be in charge of with the first combustion exhaust and be in charge of and connected and cut off conversion with the second combustion exhaust, described the first air is in charge of with the first air and is entered arm, the 3rd air enters arm and couples together, described the first gas manifold and the first coal gas enter arm, the 3rd coal gas enters arm and couples together, described the first combustion exhaust is in charge of and the first combustion exhaust exhaust outlet, the 3rd combustion exhaust exhaust outlet couples together, in like manner, described the second air is in charge of with the second air and is entered arm, the 4th air enters arm and couples together, described the second gas manifold and the second coal gas enter arm, the 4th coal gas enters arm and couples together, described the second burning gas is in charge of and the second combustion exhaust exhaust outlet, the 4th combustion exhaust exhaust outlet couples together, described material cooling chamber is arranged on lower portion of furnace body and is positioned at center support bow below, and the top of material cooling chamber communicates bottom the reduction chamber, reducing gas enters siphunculus one end and leads to the top of material cooling chamber, and reducing gas enters siphunculus, and Open Side Down towards material cooling chamber, and the other end that reducing gas enters siphunculus stretches out outside body of heater for external reducing gas.
2. a kind of external-heat reducing gas direct-reduced iron device as claimed in claim 1, it is characterized in that: described gas reversing system also comprises two groups of bustle pipes of the periphery that is arranged on body of heater, comprise the first air bustle pipe, the first coal gas bustle pipe, the first combustion exhaust bustle pipe; The second air bustle pipe, the second coal gas bustle pipe, the second combustion exhaust bustle pipe, described the first air bustle pipe the first air is in charge of with the first air enter arm, the 3rd air enters arm and couples together; Described the first coal gas bustle pipe by the first gas manifold and the first coal gas enter arm, the 3rd coal gas enters arm and couples together; Described the first combustion exhaust bustle pipe is that the first combustion exhaust is in charge of with the first combustion exhaust exhaust outlet, the 3rd combustion exhaust exhaust outlet and is coupled together; In like manner, described the second air bustle pipe the second air is in charge of with the second air enter arm, the 4th air enters arm and couples together; Described the second coal gas bustle pipe by the second gas manifold and the second coal gas enter arm, the 4th coal gas enters arm and couples together; Described the second combustion exhaust bustle pipe is in charge of the second burning gas with the second combustion exhaust exhaust outlet, the second combustion exhaust exhaust outlet and is coupled together.
3. a kind of external-heat reducing gas direct-reduced iron device as claimed in claim 1, it is characterized in that: described the first air enters between arm and the first accumulation of heat chamber and is provided with the first one-way air valve, and the first one-way air valve allows air to enter pipe and the first accumulation of heat chamber flows into the first combustion chamber from the first air; Be provided with the first unidirectional waste gas valve between described the first combustion exhaust exhaust outlet and the first accumulation of heat chamber, the first unidirectional waste gas valve allows the gas-fired waste gas first accumulation of heat chamber of flowing through from the first combustion chamber, finally from the first combustion exhaust exhaust outlet, discharges; Described the second air enters between arm and the second accumulation of heat chamber and is provided with the second one-way air valve, and the second one-way air valve allows air to enter with the second accumulation of heat chamber and flow into the second combustion chamber from the second air; Be provided with the second unidirectional waste gas valve between the second combustion exhaust exhaust outlet and the second accumulation of heat chamber, the second unidirectional waste gas valve allows the gas-fired waste gas second accumulation of heat chamber of flowing through from the second combustion chamber, finally from the second combustion exhaust exhaust outlet, discharges.
4. a kind of external-heat reducing gas direct-reduced iron device as claimed in claim 1, it is characterized in that: described outer combustion gas heating unit mainly is divided into upper, middle and lower segment formula heating, and every section by least one group of structure, identical and associated the first combustion heater, the second combustion heater form.
5. a kind of external-heat reducing gas direct-reduced iron device as claimed in claim 1, it is characterized in that: described interior gas-operated thermal bath facility mainly is divided into upper and lower two-section type heating, and every section consists of at least one group of structure identical the 3rd combustion heater, the 4th combustion heater mutually.
CN201320486069.0U 2013-08-10 2013-08-10 External heating type direct-reduced iron device by reducing gas Active CN203382782U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103409584A (en) * 2013-08-10 2013-11-27 山西鑫立能源科技有限公司 External-heating device for producing direct reduced iron by using reducing gas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103409584A (en) * 2013-08-10 2013-11-27 山西鑫立能源科技有限公司 External-heating device for producing direct reduced iron by using reducing gas

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